diff --git a/runbot_merge/__manifest__.py b/runbot_merge/__manifest__.py
index 770bd488..fff46f02 100644
--- a/runbot_merge/__manifest__.py
+++ b/runbot_merge/__manifest__.py
@@ -14,6 +14,7 @@
         'views/configuration.xml',
         'views/templates.xml',
         'models/project_freeze/views.xml',
+        'models/staging_cancel/views.xml',
     ],
     'assets': {
         'web.assets_frontend': [
diff --git a/runbot_merge/models/__init__.py b/runbot_merge/models/__init__.py
index b457f468..235ca1c5 100644
--- a/runbot_merge/models/__init__.py
+++ b/runbot_merge/models/__init__.py
@@ -2,3 +2,4 @@ from . import res_partner
 from . import project
 from . import pull_requests
 from . import project_freeze
+from . import staging_cancel
diff --git a/runbot_merge/models/pull_requests.py b/runbot_merge/models/pull_requests.py
index cd811641..8d5dcd89 100644
--- a/runbot_merge/models/pull_requests.py
+++ b/runbot_merge/models/pull_requests.py
@@ -1831,8 +1831,17 @@ class Stagings(models.Model):
             s.write(vals)
 
     def action_cancel(self):
-        self.cancel("explicitly cancelled by %s", self.env.user.display_name)
-        return { 'type': 'ir.actions.act_window_close' }
+        w = self.env['runbot_merge.stagings.cancel'].create({
+            'staging_id': self.id,
+        })
+        return {
+            'type': 'ir.actions.act_window',
+            'target': 'new',
+            'name': f'Cancel staging {self.id} ({self.target.name})',
+            'view_mode': 'form',
+            'res_model': w._name,
+            'res_id': w.id,
+        }
 
     def cancel(self, reason, *args):
         self = self.filtered('active')
diff --git a/runbot_merge/models/staging_cancel/__init__.py b/runbot_merge/models/staging_cancel/__init__.py
new file mode 100644
index 00000000..66c60ebb
--- /dev/null
+++ b/runbot_merge/models/staging_cancel/__init__.py
@@ -0,0 +1,27 @@
+import logging
+
+from odoo import models, fields
+
+_logger = logging.getLogger(__name__)
+class CancelWizard(models.TransientModel):
+    _name = 'runbot_merge.stagings.cancel'
+    _description = "Wizard for cancelling a staging"
+
+    staging_id = fields.Many2one('runbot_merge.stagings', required=True)
+    reason = fields.Char()
+    cancel_splits = fields.Boolean(help="\
+        If any split is pending, also cancel them and move the corresponding \
+        pull requests back into the general pool.")
+
+    def action_cancel(self):
+        if self.cancel_splits:
+            self.env['runbot_merge.split'].search([
+                ('target', '=', self.staging_id.target.id)
+            ]).unlink()
+
+        reason = self.reason.replace('%', '%%').strip() if self.reason else ''
+        if reason:
+            reason = f' because {reason}'
+        self.staging_id.cancel(f'Cancelled by {self.env.user.display_name}{reason}')
+        self.unlink()
+        return { 'type': 'ir.actions.act_window_close' }
diff --git a/runbot_merge/models/staging_cancel/views.xml b/runbot_merge/models/staging_cancel/views.xml
new file mode 100644
index 00000000..a7300d23
--- /dev/null
+++ b/runbot_merge/models/staging_cancel/views.xml
@@ -0,0 +1,17 @@
+<odoo>
+    <record id="runbot_merge_stagings_cancel_form" model="ir.ui.view">
+        <field name="name">Staging Cancel Form</field>
+        <field name="model">runbot_merge.stagings.cancel</field>
+        <field name="arch" type="xml">
+            <form>
+                <group>
+                    <group colspan="4"><field name="reason"/></group>
+                    <group colspan="4"><field name="cancel_splits"/></group>
+                </group>
+                <footer>
+                    <button string="Confirm" name="action_cancel" type="object" class="btn btn-primary"/>
+                </footer>
+            </form>
+        </field>
+    </record>
+</odoo>
diff --git a/runbot_merge/security/ir.model.access.csv b/runbot_merge/security/ir.model.access.csv
index 0de5d476..65f02444 100644
--- a/runbot_merge/security/ir.model.access.csv
+++ b/runbot_merge/security/ir.model.access.csv
@@ -10,6 +10,7 @@ access_runbot_merge_pull_requests_admin,Admin access to PR,model_runbot_merge_pu
 access_runbot_merge_pull_requests_tagging_admin,Admin access to tagging,model_runbot_merge_pull_requests_tagging,runbot_merge.group_admin,1,1,1,1
 access_runbot_merge_commit_admin,Admin access to commits,model_runbot_merge_commit,runbot_merge.group_admin,1,1,1,1
 access_runbot_merge_stagings_admin,Admin access to stagings,model_runbot_merge_stagings,runbot_merge.group_admin,1,1,1,1
+access_runbot_merge_stagings_cancel_admin,Admin access to cancelling stagings,model_runbot_merge_stagings_cancel,runbot_merge.group_admin,1,1,1,1
 access_runbot_merge_split_admin,Admin access to splits,model_runbot_merge_split,runbot_merge.group_admin,1,1,1,1
 access_runbot_merge_batch_admin,Admin access to batches,model_runbot_merge_batch,runbot_merge.group_admin,1,1,1,1
 access_runbot_merge_fetch_job_admin,Admin access to fetch jobs,model_runbot_merge_fetch_job,runbot_merge.group_admin,1,1,1,1