diff --git a/app/components/types_de_champ_editor/champ_component.rb b/app/components/types_de_champ_editor/champ_component.rb
index 87fcd2fdf..3b8eca491 100644
--- a/app/components/types_de_champ_editor/champ_component.rb
+++ b/app/components/types_de_champ_editor/champ_component.rb
@@ -82,6 +82,14 @@ class TypesDeChampEditor::ChampComponent < ApplicationComponent
     }
   end
 
+  def notice_explicative_options
+    {
+      attached_file: type_de_champ.notice_explicative,
+      auto_attach_url: helpers.auto_attach_url(type_de_champ),
+      view_as: :download
+    }
+  end
+
   EXCLUDE_FROM_BLOCK = [
     TypeDeChamp.type_champs.fetch(:carte),
     TypeDeChamp.type_champs.fetch(:dossier_link),
diff --git a/app/components/types_de_champ_editor/champ_component/champ_component.html.haml b/app/components/types_de_champ_editor/champ_component/champ_component.html.haml
index 187234bcc..de9480aae 100644
--- a/app/components/types_de_champ_editor/champ_component/champ_component.html.haml
+++ b/app/components/types_de_champ_editor/champ_component/champ_component.html.haml
@@ -97,6 +97,11 @@
                 %p Dans le cadre de la RGPD, le titre d’identité sera supprimé lors de l’acceptation du dossier
               - elsif procedure.piece_justificative_multiple?
                 %p Les usagers pourront envoyer plusieurs fichiers si nécessaire.
+          - if type_de_champ.explication?
+            .cell
+              = form.label :notice_explicative, "Notice explicative", for: dom_id(type_de_champ, :notice_explicative)
+              = render Attachment::EditComponent.new(**notice_explicative_options)
+
           - if type_de_champ.carte?
             - type_de_champ.editable_options.each do |slice|
               .cell
diff --git a/app/controllers/administrateurs/types_de_champ_controller.rb b/app/controllers/administrateurs/types_de_champ_controller.rb
index 73d41b37f..88aa11a95 100644
--- a/app/controllers/administrateurs/types_de_champ_controller.rb
+++ b/app/controllers/administrateurs/types_de_champ_controller.rb
@@ -44,6 +44,19 @@ module Administrateurs
       end
     end
 
+    def notice_explicative
+      type_de_champ = draft.find_and_ensure_exclusive_use(params[:stable_id])
+      byebug
+      if type_de_champ.notice_explicative.attach(params[:blob_signed_id])
+        @coordinate = draft.coordinate_for(type_de_champ)
+        @morphed = [champ_component_from(@coordinate)]
+
+        render :create
+      else
+        render json: { errors: @champ.errors.full_messages }, status: 422
+      end
+    end
+
     def move
       draft.move_type_de_champ(params[:stable_id], params[:position].to_i)
     end
diff --git a/app/helpers/champ_helper.rb b/app/helpers/champ_helper.rb
index 2e7971a85..61c988788 100644
--- a/app/helpers/champ_helper.rb
+++ b/app/helpers/champ_helper.rb
@@ -10,8 +10,10 @@ module ChampHelper
   def auto_attach_url(object, params = {})
     if object.is_a?(Champ)
       champs_attach_piece_justificative_url(object.id, params)
-    elsif object.is_a?(TypeDeChamp)
+    elsif object.is_a?(TypeDeChamp) && object.piece_justificative?
       piece_justificative_template_admin_procedure_type_de_champ_url(stable_id: object.stable_id, procedure_id: object.procedure.id, **params)
+    elsif object.is_a?(TypeDeChamp) && object.explication?
+      notice_explicative_admin_procedure_type_de_champ_url(stable_id: object.stable_id, procedure_id: object.procedure.id, **params)
     end
   end
 end
diff --git a/app/models/type_de_champ.rb b/app/models/type_de_champ.rb
index a29369b95..602b33d17 100644
--- a/app/models/type_de_champ.rb
+++ b/app/models/type_de_champ.rb
@@ -193,6 +193,21 @@ class TypeDeChamp < ApplicationRecord
   validates :piece_justificative_template, size: { less_than: FILE_MAX_SIZE }
   validates :piece_justificative_template, content_type: AUTHORIZED_CONTENT_TYPES
 
+  has_one_attached :notice_explicative
+  validates :notice_explicative, content_type: [
+    "application/msword",
+    "application/pdf",
+    "application/vnd.ms-powerpoint",
+    "application/vnd.oasis.opendocument.presentation",
+    "application/vnd.oasis.opendocument.text",
+    "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+    "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+    "image/jpeg",
+    "image/jpg",
+    "image/png",
+    "text/plain"
+  ], size: { less_than: 20.megabytes }
+
   validates :libelle, presence: true, allow_blank: false, allow_nil: false
   validates :type_champ, presence: true, allow_blank: false, allow_nil: false
   validates :character_limit, numericality: {
diff --git a/config/routes.rb b/config/routes.rb
index aaa75f6ac..245ad19f4 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -625,6 +625,7 @@ Rails.application.routes.draw do
           patch :move_up
           patch :move_down
           put :piece_justificative_template
+          put :notice_explicative
         end
       end
 
diff --git a/spec/components/types_de_champ_editor/champ_component_spec.rb b/spec/components/types_de_champ_editor/champ_component_spec.rb
index 40d1250ac..2ec4a9342 100644
--- a/spec/components/types_de_champ_editor/champ_component_spec.rb
+++ b/spec/components/types_de_champ_editor/champ_component_spec.rb
@@ -50,5 +50,14 @@ describe TypesDeChampEditor::ChampComponent, type: :component do
         end
       end
     end
+
+    describe 'tdc explication' do
+      let(:procedure) { create(:procedure, types_de_champ_public: [{ type: :explication }]) }
+      let(:coordinate) { procedure.draft_revision.revision_types_de_champ_public.first }
+      it 'includes an uploader for notice_explicative' do
+        expect(page).to have_css('label', text: 'Notice explicative')
+        expect(page).to have_css('input[type=file]')
+      end
+    end
   end
 end
diff --git a/spec/controllers/administrateurs/types_de_champ_controller_spec.rb b/spec/controllers/administrateurs/types_de_champ_controller_spec.rb
index 4b26f71bb..8c2db31a2 100644
--- a/spec/controllers/administrateurs/types_de_champ_controller_spec.rb
+++ b/spec/controllers/administrateurs/types_de_champ_controller_spec.rb
@@ -188,4 +188,20 @@ describe Administrateurs::TypesDeChampController, type: :controller do
       end
     end
   end
+
+  describe '#notice_explicative' do
+    let(:procedure) { create(:procedure, types_de_champ_public: [{ type: :explication }]) }
+    let(:coordinate) { procedure.draft_revision.types_de_champ.first }
+    let(:file) { Tempfile.new }
+    let(:blob) { ActiveStorage::Blob.create_before_direct_upload!(filename: File.basename(file.path), byte_size: file.size, checksum: Digest::SHA256.file(file.path), content_type: 'text/plain') }
+
+    context 'when sending a valid blob' do
+      it 'attaches the blob and responds with 200' do
+        expect { put :notice_explicative, format: :turbo_stream, params: { stable_id: coordinate.stable_id, procedure_id: procedure.id, blob_signed_id: blob.signed_id } }
+          .to change { coordinate.reload.notice_explicative.attached? }
+          .from(false).to(true)
+        expect(response).to have_http_status(:success)
+      end
+    end
+  end
 end