diff --git a/src/main/java/com/gbsw/snapy/domain/auth/service/AuthService.java b/src/main/java/com/gbsw/snapy/domain/auth/service/AuthService.java
index 21e93bf..d762fc2 100644
--- a/src/main/java/com/gbsw/snapy/domain/auth/service/AuthService.java
+++ b/src/main/java/com/gbsw/snapy/domain/auth/service/AuthService.java
@@ -13,6 +13,7 @@
 import com.gbsw.snapy.domain.users.repository.UserRepository;
 import com.gbsw.snapy.global.exception.CustomException;
 import com.gbsw.snapy.global.exception.ErrorCode;
+import com.gbsw.snapy.global.filter.BannedWordFilter;
 import com.gbsw.snapy.global.security.jwt.JwtProperties;
 import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
@@ -33,9 +34,13 @@ public class AuthService {
     private final PasswordEncoder passwordEncoder;
     private final JwtProvider jwtProvider;
     private final JwtProperties jwtProperties;
+    private final BannedWordFilter bannedWordFilter;
 
     @Transactional
     public RegisterResponse register(RegisterRequest dto) {
+        if (bannedWordFilter.containsBannedWord(dto.getHandle())) {
+            throw new CustomException(ErrorCode.HANDLE_CONTAINS_BANNED_WORD);
+        }
         if (userRepository.existsByHandle(dto.getHandle())) {
             throw new CustomException(ErrorCode.DUPLICATE_HANDLE);
         }
diff --git a/src/main/java/com/gbsw/snapy/domain/users/service/UserService.java b/src/main/java/com/gbsw/snapy/domain/users/service/UserService.java
index dc64227..ee78e9b 100644
--- a/src/main/java/com/gbsw/snapy/domain/users/service/UserService.java
+++ b/src/main/java/com/gbsw/snapy/domain/users/service/UserService.java
@@ -17,6 +17,7 @@
 import com.gbsw.snapy.domain.streaks.service.StreakService;
 import com.gbsw.snapy.global.exception.CustomException;
 import com.gbsw.snapy.global.exception.ErrorCode;
+import com.gbsw.snapy.global.filter.BannedWordFilter;
 import com.gbsw.snapy.infra.s3.S3Service;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -36,6 +37,7 @@ public class UserService {
     private final S3Service s3Service;
     private final StreakService streakService;
     private final PhoneVerificationService phoneVerificationService;
+    private final BannedWordFilter bannedWordFilter;
 
     public UserProfileResponse getProfile(String handle, Long viewerId) {
         User user = userRepository.findByHandleAndDeletedAtIsNull(handle)
@@ -145,12 +147,18 @@ public void deleteAccount(Long userId) {
     }
 
     public CheckHandleResponse checkHandle(String handle) {
+        if (bannedWordFilter.containsBannedWord(handle)) {
+            throw new CustomException(ErrorCode.HANDLE_CONTAINS_BANNED_WORD);
+        }
         boolean available = !userRepository.existsByHandle(handle);
         return new CheckHandleResponse(available);
     }
 
     @Transactional
     public void updateHandle(Long userId, UpdateHandleRequest request) {
+        if (bannedWordFilter.containsBannedWord(request.getHandle())) {
+            throw new CustomException(ErrorCode.HANDLE_CONTAINS_BANNED_WORD);
+        }
         if (userRepository.existsByHandle(request.getHandle())) {
             throw new CustomException(ErrorCode.DUPLICATE_HANDLE);
         }
diff --git a/src/main/java/com/gbsw/snapy/global/exception/ErrorCode.java b/src/main/java/com/gbsw/snapy/global/exception/ErrorCode.java
index 1daad7f..01f44d7 100644
--- a/src/main/java/com/gbsw/snapy/global/exception/ErrorCode.java
+++ b/src/main/java/com/gbsw/snapy/global/exception/ErrorCode.java
@@ -29,6 +29,7 @@ public enum ErrorCode {
     DELETED_USER(HttpStatus.NOT_FOUND, "탈퇴한 사용자입니다."),
     INVALID_CREDENTIALS(HttpStatus.UNAUTHORIZED, "이메일 또는 비밀번호가 올바르지 않습니다."),
     DUPLICATE_HANDLE(HttpStatus.CONFLICT, "이미 사용 중인 핸들입니다."),
+    HANDLE_CONTAINS_BANNED_WORD(HttpStatus.BAD_REQUEST, "사용할 수 없는 단어가 포함되어 있습니다."),
     DUPLICATE_EMAIL(HttpStatus.CONFLICT, "이미 사용 중인 이메일입니다."),
     DUPLICATE_PHONE(HttpStatus.CONFLICT, "이미 사용 중인 전화번호입니다."),
 
diff --git a/src/main/java/com/gbsw/snapy/global/filter/BannedWordFilter.java b/src/main/java/com/gbsw/snapy/global/filter/BannedWordFilter.java
new file mode 100644
index 0000000..6484636
--- /dev/null
+++ b/src/main/java/com/gbsw/snapy/global/filter/BannedWordFilter.java
@@ -0,0 +1,44 @@
+package com.gbsw.snapy.global.filter;
+
+import jakarta.annotation.PostConstruct;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Component;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@Slf4j
+@Component
+public class BannedWordFilter {
+
+    private static final String BANNED_WORDS_PATH = "filter/banned-words.txt";
+
+    private Set<String> bannedWords;
+
+    @PostConstruct
+    public void init() throws IOException {
+        ClassPathResource resource = new ClassPathResource(BANNED_WORDS_PATH);
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(resource.getInputStream(), StandardCharsets.UTF_8))) {
+            bannedWords = reader.lines()
+                    .map(String::trim)
+                    .filter(line -> !line.isEmpty() && !line.startsWith("#"))
+                    .map(String::toLowerCase)
+                    .collect(Collectors.toUnmodifiableSet());
+        }
+        log.info("BannedWordFilter loaded {} words", bannedWords.size());
+    }
+
+    public boolean containsBannedWord(String input) {
+        if (input == null || input.isBlank()) {
+            return false;
+        }
+        String normalized = input.toLowerCase().replaceAll("\\s+", "");
+        return bannedWords.stream().anyMatch(normalized::contains);
+    }
+}
diff --git a/src/main/resources/filter/banned-words.txt b/src/main/resources/filter/banned-words.txt
new file mode 100644
index 0000000..2ba5fdc
--- /dev/null
+++ b/src/main/resources/filter/banned-words.txt
@@ -0,0 +1,962 @@
+2 girls 1 cup
+2g1c
+4r5e
+5h1t
+5hit
+a55
+a_s_s
+acrotomophilia
+alabama hot pocket
+alaskan pipeline
+anal
+anilingus
+anus
+apeshit
+ar5e
+arrse
+arse
+arsehole
+ass
+ass-fucker
+ass-hat
+ass-pirate
+assbag
+assbandit
+assbanger
+assbite
+assclown
+asscock
+asscracker
+asses
+assface
+assfucker
+assfukka
+assgoblin
+asshat
+asshead
+asshole
+assholes
+asshopper
+assjacker
+asslick
+asslicker
+assmonkey
+assmunch
+assmuncher
+asspirate
+assshole
+asssucker
+asswad
+asswhole
+asswipe
+auto erotic
+autoerotic
+b!tch
+b00bs
+b17ch
+b1tch
+babeland
+baby batter
+baby juice
+ball gag
+ball gravy
+ball kicking
+ball licking
+ball sack
+ball sucking
+ballbag
+balls
+ballsack
+bampot
+bangbros
+bareback
+barely legal
+barenaked
+bastard
+bastardo
+bastinado
+bbw
+bdsm
+beaner
+beaners
+beastial
+beastiality
+beastility
+beaver cleaver
+beaver lips
+bellend
+bestial
+bestiality
+bi+ch
+biatch
+big black
+big breasts
+big knockers
+big tits
+bimbos
+birdlock
+bitch
+bitcher
+bitchers
+bitches
+bitchin
+bitching
+black cock
+blonde action
+blonde on blonde action
+bloody
+blow job
+blow your load
+blowjob
+blowjobs
+blue waffle
+blumpkin
+boiolas
+bollock
+bollocks
+bollok
+bollox
+bondage
+boner
+boob
+boobie
+boobs
+booobs
+boooobs
+booooobs
+booooooobs
+booty call
+breasts
+brown showers
+brunette action
+buceta
+bugger
+bukkake
+bulldyke
+bullet vibe
+bullshit
+bum
+bung hole
+bunghole
+bunny fucker
+busty
+butt
+butt-pirate
+buttcheeks
+butthole
+buttmunch
+buttplug
+c0ck
+c0cksucker
+camel toe
+camgirl
+camslut
+camwhore
+carpet muncher
+carpetmuncher
+cawk
+chinc
+chink
+choad
+chocolate rosebuds
+chode
+cipa
+circlejerk
+cl1t
+cleveland steamer
+clit
+clitface
+clitoris
+clits
+clover clamps
+clusterfuck
+cnut
+cock
+cock-sucker
+cockbite
+cockburger
+cockface
+cockhead
+cockjockey
+cockknoker
+cockmaster
+cockmongler
+cockmongruel
+cockmonkey
+cockmunch
+cockmuncher
+cocknose
+cocknugget
+cocks
+cockshit
+cocksmith
+cocksmoker
+cocksuck
+cocksuck 
+cocksucked
+cocksucked 
+cocksucker
+cocksucking
+cocksucks 
+cocksuka
+cocksukka
+cok
+cokmuncher
+coksucka
+coochie
+coochy
+coon
+coons
+cooter
+coprolagnia
+coprophilia
+cornhole
+cox
+crap
+creampie
+cum
+cumbubble
+cumdumpster
+cumguzzler
+cumjockey
+cummer
+cumming
+cums
+cumshot
+cumslut
+cumtart
+cunilingus
+cunillingus
+cunnie
+cunnilingus
+cunt
+cuntface
+cunthole
+cuntlick
+cuntlick 
+cuntlicker
+cuntlicker 
+cuntlicking
+cuntlicking 
+cuntrag
+cunts
+cyalis
+cyberfuc
+cyberfuck 
+cyberfucked 
+cyberfucker
+cyberfuckers
+cyberfucking 
+d1ck
+dammit
+damn
+darkie
+date rape
+daterape
+deep throat
+deepthroat
+dendrophilia
+dick
+dickbag
+dickbeater
+dickface
+dickhead
+dickhole
+dickjuice
+dickmilk
+dickmonger
+dickslap
+dicksucker
+dickwad
+dickweasel
+dickweed
+dickwod
+dike
+dildo
+dildos
+dingleberries
+dingleberry
+dink
+dinks
+dipshit
+dirsa
+dirty pillows
+dirty sanchez
+dlck
+dog style
+dog-fucker
+doggie style
+doggiestyle
+doggin
+dogging
+doggy style
+doggystyle
+dolcett
+domination
+dominatrix
+dommes
+donkey punch
+donkeyribber
+doochbag
+dookie
+doosh
+double dong
+double penetration
+douche
+douchebag
+dp action
+dry hump
+duche
+dumb
+dumbshit
+dumshit
+dvda
+dyke
+eat my ass
+ecchi
+ejaculate
+ejaculated
+ejaculates 
+ejaculating 
+ejaculatings
+ejaculation
+ejakulate
+erotic
+erotism
+escort
+eunuch
+f u c k
+f u c k e r
+f4nny
+f_u_c_k
+fag
+fagbag
+fagg
+fagging
+faggit
+faggitt
+faggot
+faggs
+fagot
+fagots
+fags
+fagtard
+fanny
+fannyflaps
+fannyfucker
+fanyy
+fart
+farted
+farting
+farty
+fatass
+fcuk
+fcuker
+fcuking
+fecal
+feck
+fecker
+felatio
+felch
+felching
+fellate
+fellatio
+feltch
+female squirting
+femdom
+figging
+fingerbang
+fingerfuck 
+fingerfucked 
+fingerfucker 
+fingerfuckers
+fingerfucking 
+fingerfucks 
+fingering
+fistfuck
+fistfucked 
+fistfucker 
+fistfuckers 
+fistfucking 
+fistfuckings 
+fistfucks 
+fisting
+flamer
+flange
+fook
+fooker
+fool
+foot fetish
+footjob
+frotting
+fuck
+fuck buttons
+fucka
+fucked
+fucker
+fuckers
+fuckhead
+fuckheads
+fuckin
+fucking
+fuckings
+fuckingshitmotherfucker
+fuckme 
+fucks
+fucktards
+fuckwhit
+fuckwit
+fudge packer
+fudgepacker
+fuk
+fuker
+fukker
+fukkin
+fuks
+fukwhit
+fukwit
+futanari
+fux
+fux0r
+g-spot
+gang bang
+gangbang
+gangbanged
+gangbanged 
+gangbangs 
+gay sex
+gayass
+gaybob
+gaydo
+gaylord
+gaysex
+gaytard
+gaywad
+genitals
+giant cock
+girl on
+girl on top
+girls gone wild
+goatcx
+goatse
+god damn
+god-dam
+god-damned
+goddamn
+goddamned
+gokkun
+golden shower
+goo girl
+gooch
+goodpoop
+gook
+goregasm
+gringo
+grope
+group sex
+guido
+guro
+hand job
+handjob
+hard core
+hardcore
+hardcoresex 
+heeb
+hell
+hentai
+heshe
+ho
+hoar
+hoare
+hoe
+hoer
+homo
+homoerotic
+honkey
+honky
+hooker
+hore
+horniest
+horny
+hot carl
+hot chick
+hotsex
+how to kill
+how to murder
+huge fat
+humping
+incest
+intercourse
+jack off
+jack-off 
+jackass
+jackoff
+jail bait
+jailbait
+jap
+jelly donut
+jerk
+jerk off
+jerk-off 
+jigaboo
+jiggaboo
+jiggerboo
+jism
+jiz
+jiz 
+jizm
+jizm 
+jizz
+juggs
+kawk
+kike
+kinbaku
+kinkster
+kinky
+kiunt
+knob
+knobbing
+knobead
+knobed
+knobend
+knobhead
+knobjocky
+knobjokey
+kock
+kondum
+kondums
+kooch
+kootch
+kum
+kumer
+kummer
+kumming
+kums
+kunilingus
+kunt
+kyke
+l3i+ch
+l3itch
+labia
+leather restraint
+leather straight jacket
+lemon party
+lesbo
+lezzie
+lmfao
+lolita
+lovemaking
+lust
+lusting
+m0f0
+m0fo
+m45terbate
+ma5terb8
+ma5terbate
+make me come
+male squirting
+masochist
+master-bate
+masterb8
+masterbat*
+masterbat3
+masterbate
+masterbation
+masterbations
+masturbate
+menage a trois
+milf
+minge
+missionary position
+mo-fo
+mof0
+mofo
+mothafuck
+mothafucka
+mothafuckas
+mothafuckaz
+mothafucked 
+mothafucker
+mothafuckers
+mothafuckin
+mothafucking 
+mothafuckings
+mothafucks
+mother fucker
+motherfuck
+motherfucked
+motherfucker
+motherfuckers
+motherfuckin
+motherfucking
+motherfuckings
+motherfuckka
+motherfucks
+mound of venus
+mr hands
+muff
+muff diver
+muffdiver
+muffdiving
+mutha
+muthafecker
+muthafuckker
+muther
+mutherfucker
+n1gga
+n1gger
+nambla
+nawashi
+nazi
+negro
+neonazi
+nig nog
+nigg3r
+nigg4h
+nigga
+niggah
+niggas
+niggaz
+nigger
+niggers 
+niglet
+nimphomania
+nipple
+nipples
+nob
+nob jokey
+nobhead
+nobjocky
+nobjokey
+nsfw images
+nude
+nudity
+numbnuts
+nutsack
+nympho
+nymphomania
+octopussy
+omorashi
+one cup two girls
+one guy one jar
+orgasim
+orgasim 
+orgasims 
+orgasm
+orgasms 
+orgy
+p0rn
+paedophile
+paki
+panooch
+panties
+panty
+pawn
+pecker
+peckerhead
+pedobear
+pedophile
+pegging
+penis
+penisfucker
+phone sex
+phonesex
+phuck
+phuk
+phuked
+phuking
+phukked
+phukking
+phuks
+phuq
+piece of shit
+pigfucker
+pimpis
+pis
+pises
+pisin
+pising
+pisof
+piss
+piss pig
+pissed
+pisser
+pissers
+pisses 
+pissflap
+pissflaps
+pissin
+pissin 
+pissing
+pissoff
+pissoff 
+pisspig
+playboy
+pleasure chest
+pole smoker
+polesmoker
+pollock
+ponyplay
+poo
+poof
+poon
+poonani
+poonany
+poontang
+poop
+poop chute
+poopchute
+porn
+porno
+pornography
+pornos
+prick
+pricks 
+prince albert piercing
+pron
+pthc
+pube
+pubes
+punanny
+punany
+punta
+pusies
+pusse
+pussi
+pussies
+pussy
+pussylicking
+pussys 
+pusy
+puto
+queaf
+queef
+queerbait
+queerhole
+quim
+raghead
+raging boner
+rape
+raping
+rapist
+rectum
+renob
+retard
+reverse cowgirl
+rimjaw
+rimjob
+rimming
+rosy palm
+rosy palm and her 5 sisters
+ruski
+rusty trombone
+s hit
+s&m
+s.o.b.
+s_h_i_t
+sadism
+sadist
+santorum
+scat
+schlong
+scissoring
+screwing
+scroat
+scrote
+scrotum
+semen
+sex
+sexo
+sexy
+sh!+
+sh!t
+sh1t
+shag
+shagger
+shaggin
+shagging
+shaved beaver
+shaved pussy
+shemale
+shi+
+shibari
+shit
+shit-ass
+shit-bag
+shit-bagger
+shit-brain
+shit-breath
+shit-cunt
+shit-dick
+shit-eating
+shit-face
+shit-faced
+shit-fit
+shit-head
+shit-heel
+shit-hole
+shit-house
+shit-load
+shit-pot
+shit-spitter
+shit-stain
+shitass
+shitbag
+shitbagger
+shitblimp
+shitbrain
+shitbreath
+shitcunt
+shitdick
+shite
+shiteating
+shited
+shitey
+shitface
+shitfaced
+shitfit
+shitfuck
+shitfull
+shithead
+shitheel
+shithole
+shithouse
+shiting
+shitings
+shitload
+shitpot
+shits
+shitspitter
+shitstain
+shitted
+shitter
+shitters 
+shittiest
+shitting
+shittings
+shitty
+shitty 
+shity
+shiz
+shiznit
+shota
+shrimping
+skank
+skeet
+slanteye
+slut
+slutbag
+sluts
+smeg
+smegma
+smut
+snatch
+snowballing
+sodomize
+sodomy
+son-of-a-bitch
+spac
+spic
+spick
+splooge
+splooge moose
+spooge
+spread legs
+spunk
+strap on
+strapon
+strappado
+strip club
+style doggy
+suck
+sucker
+sucks
+suicide girls
+sultry women
+swastika
+swinger
+t1tt1e5
+t1tties
+tainted love
+tard
+taste my
+tea bagging
+teets
+teez
+testical
+testicle
+threesome
+throating
+thundercunt
+tied up
+tight white
+tit
+titfuck
+tits
+titt
+tittie5
+tittiefucker
+titties
+titty
+tittyfuck
+tittywank
+titwank
+tongue in a
+topless
+tosser
+towelhead
+tranny
+tribadism
+tub girl
+tubgirl
+turd
+tushy
+tw4t
+twat
+twathead
+twatlips
+twatty
+twink
+twinkie
+two girls one cup
+twunt
+twunter
+undressing
+upskirt
+urethra play
+urophilia
+v14gra
+v1gra
+va-j-j
+vag
+vagina
+venus mound
+viagra
+vibrator
+violet wand
+vjayjay
+vorarephilia
+voyeur
+vulva
+w00se
+wang
+wank
+wanker
+wanky
+wet dream
+wetback
+white power
+whoar
+whore
+willies
+willy
+wrapping men
+wrinkled starfish
+xrated
+xx
+xxx
+yaoi
+yellow showers
+yiffy
+zoophilia
+🖕