diff --git a/app/helpers/procedure_helper.rb b/app/helpers/procedure_helper.rb
index 4d64efe0b..5cfc94452 100644
--- a/app/helpers/procedure_helper.rb
+++ b/app/helpers/procedure_helper.rb
@@ -24,6 +24,12 @@ module ProcedureHelper
     t(action, scope: [:modal, :publish, key])
   end
 
+  # Returns a hash of { attribute: full_message } errors.
+  def procedure_publication_errors(procedure)
+    procedure.validate(:publication)
+    procedure.errors.to_hash(full_messages: true).except(:path)
+  end
+
   def types_de_champ_data(procedure)
     {
       isAnnotation: false,
diff --git a/app/views/administrateurs/procedures/_publication_form.html.haml b/app/views/administrateurs/procedures/_publication_form.html.haml
index 76900b50e..aaae4eca8 100644
--- a/app/views/administrateurs/procedures/_publication_form.html.haml
+++ b/app/views/administrateurs/procedures/_publication_form.html.haml
@@ -1,6 +1,13 @@
 .card.mb-4
   %h2.card-title Publiez votre démarche
   = form_tag admin_procedure_publish_path(procedure_id: procedure.id), method: :put, class: 'form' do
+    - publication_errors = procedure_publication_errors(procedure)
+    - if publication_errors.present?
+      .card.warning
+        .card-title Des problèmes empêchent la publication de la démarche
+        - publication_errors.each do |_attribute, full_messages|
+          %p= full_messages.to_sentence
+
     - if procedure.draft_changed?
       %p.mb-4 Publiez une nouvelle version de votre démarche. Les modifications suivantes seront appliquées :
       = render partial: 'revision_changes', locals: { changes: procedure.revision_changes }
@@ -31,4 +38,4 @@
                           placeholder: 'https://exemple.gouv.fr/ma_demarche')
 
     .flex.justify-end
-      = submit_tag procedure_publish_label(procedure, :submit), { class: "button primary", id: 'publish' }
+      = submit_tag procedure_publish_label(procedure, :submit), { disabled: publication_errors.present?, class: "button primary", id: 'publish' }
diff --git a/spec/system/administrateurs/procedure_publish_spec.rb b/spec/system/administrateurs/procedure_publish_spec.rb
index d4069e898..dc8f6c14a 100644
--- a/spec/system/administrateurs/procedure_publish_spec.rb
+++ b/spec/system/administrateurs/procedure_publish_spec.rb
@@ -31,10 +31,13 @@ describe 'Publishing a procedure', js: true do
   end
 
   context 'when a procedure isn’t published yet' do
-    scenario 'an admin can publish it' do
+    before do
       visit admin_procedures_path(statut: "brouillons")
       click_on procedure.libelle
       find('#publish-procedure-link').click
+    end
+
+    scenario 'an admin can publish it' do
       expect(find_field('procedure_path').value).to eq procedure.path
       fill_in 'lien_site_web', with: 'http://some.website'
       click_on 'Publier'
@@ -42,6 +45,28 @@ describe 'Publishing a procedure', js: true do
       expect(page).to have_text('Démarche publiée')
       expect(page).to have_selector('#preview-procedure')
     end
+
+    context 'when the procedure has invalid champs' do
+      let(:empty_repetition) { build(:type_de_champ_repetition, types_de_champ: []) }
+      let!(:procedure) do
+        create(:procedure,
+               :with_path,
+               :with_service,
+               instructeurs: instructeurs,
+               administrateur: administrateur,
+               types_de_champ: [empty_repetition])
+      end
+
+      scenario 'an error message prevents the publication' do
+        expect(page).to have_content('Des problèmes empêchent la publication de la démarche')
+        expect(page).to have_content("Le bloc répétable « #{empty_repetition.libelle} » doit comporter au moins un champ")
+
+        expect(find_field('procedure_path').value).to eq procedure.path
+        fill_in 'lien_site_web', with: 'http://some.website'
+
+        expect(page).to have_button('Publier', disabled: true)
+      end
+    end
   end
 
   context 'when a procedure is closed' do