diff --git a/app/models/card.rb b/app/models/card.rb
index 2bad5a143..3a8f751a7 100644
--- a/app/models/card.rb
+++ b/app/models/card.rb
@@ -16,8 +16,10 @@ class Card < ApplicationRecord
 
   has_many :ports, as: :attachable, dependent: :destroy
   has_many :cables, through: :ports
+  has_many :connections, through: :ports, source: "connections"
 
   validates :first_position, numericality: { only_integer: true, in: 0..100 }, allow_nil: true
+  validate :ensure_card_type_have_enough_ports
 
   after_commit :set_twin_card
 
@@ -69,4 +71,12 @@ def set_twin_card
         .update_all({ twin_card_id: nil }) # rubocop:disable Rails/SkipsModelValidations
     end
   end
+
+  private
+
+  def ensure_card_type_have_enough_ports
+    port_quantity = card_type&.port_quantity || 0
+
+    errors.add(:card_type_id, :not_enough_ports) if connections.count > port_quantity
+  end
 end
diff --git a/config/locales/activerecord.en.yml b/config/locales/activerecord.en.yml
index 52bc1e5cb..8711fc255 100644
--- a/config/locales/activerecord.en.yml
+++ b/config/locales/activerecord.en.yml
@@ -283,6 +283,8 @@ en:
         port_type: Port type
         port_type_id: Port type
         number: Number
+      cards:
+        card_type_id: Card type
 
     errors:
       models:
@@ -315,6 +317,11 @@ en:
             domain_ids:
               blank: can't be blank, or "All domains" must be checked
 
+        card:
+          attributes:
+            card_type_id:
+              not_enough_ports: doesn't contain enough ports
+
       messages:
         contains_unpermitted_values: "includes unauthorized values: %{wrong_values}"
 
diff --git a/config/locales/activerecord.fr.yml b/config/locales/activerecord.fr.yml
index a9bd6f70d..45c339411 100644
--- a/config/locales/activerecord.fr.yml
+++ b/config/locales/activerecord.fr.yml
@@ -516,6 +516,8 @@ fr:
         port_type_id: Type de port
         port_type: Type de port
         number: Numéro
+      cards:
+        card_type_id: "Type de carte"
 
     errors:
       models:
@@ -548,6 +550,11 @@ fr:
             domain_ids:
               blank: doit être rempli, ou "Tous les domaines" doit être coché
 
+        card:
+          attributes:
+            card_type_id:
+              not_enough_ports: ne contient pas assez de ports
+
       messages:
         contains_unpermitted_values: "contient des valeurs non autorisées : %{wrong_values}"
 
diff --git a/spec/models/card_spec.rb b/spec/models/card_spec.rb
index e4b3bd3d2..4401373ca 100644
--- a/spec/models/card_spec.rb
+++ b/spec/models/card_spec.rb
@@ -20,6 +20,27 @@
     it { is_expected.to validate_numericality_of(:first_position).only_integer.is_in(0..100).allow_nil }
   end
 
+  describe "#ensure_card_type_have_enough_ports" do
+    before do
+      card.card_type = card_type
+      card.validate
+    end
+
+    context "when enough ports" do
+      let(:card_type) { card_types(:four) }
+
+      it { expect(card).to be_valid }
+    end
+
+    context "when not enough ports" do
+      let(:card) { cards(:one) }
+      let(:card_type) { card_types(:two) }
+
+      it { expect(card).not_to be_valid }
+      it { expect(card.errors.where(:card_type_id, :not_enough_ports).count).to eq(1) }
+    end
+  end
+
   describe "#to_s" do
     it { expect(card.to_s).to eq("Carte ServerName1 / Card1 / compo1") }
   end
diff --git a/test/fixtures/card_types.yml b/test/fixtures/card_types.yml
index a87ea631a..9980801b7 100644
--- a/test/fixtures/card_types.yml
+++ b/test/fixtures/card_types.yml
@@ -2,7 +2,7 @@ one:
   id: 1
   name: Card1
   port_type_id: 3
-  port_quantity: 2
+  port_quantity: 3
 
 two:
   id: 2