diff --git a/account_banking_mandate/models/account_banking_mandate.py b/account_banking_mandate/models/account_banking_mandate.py
index a25664f95..10cb42185 100644
--- a/account_banking_mandate/models/account_banking_mandate.py
+++ b/account_banking_mandate/models/account_banking_mandate.py
@@ -64,12 +64,44 @@ class AccountBankingMandate(models.Model):
     payment_line_ids = fields.One2many(
         comodel_name='account.payment.line', inverse_name='mandate_id',
         string="Related Payment Lines")
+    payment_line_ids_count = fields.Integer(
+        compute='_compute_payment_line_ids_count',
+    )
 
     _sql_constraints = [(
         'mandate_ref_company_uniq',
         'unique(unique_mandate_reference, company_id)',
         'A Mandate with the same reference already exists for this company!')]
 
+    @api.multi
+    @api.depends('payment_line_ids')
+    def _compute_payment_line_ids_count(self):
+        payment_line_model = self.env['account.payment.line']
+        domain = [('mandate_id', 'in', self.ids)]
+        res = payment_line_model.read_group(
+            domain=domain,
+            fields=['mandate_id'],
+            groupby=['mandate_id'],
+        )
+        payment_line_dict = {}
+        for dic in res:
+            mandate_id = dic['mandate_id'][0]
+            payment_line_dict.setdefault(mandate_id, 0)
+            payment_line_dict[mandate_id] += dic['mandate_id_count']
+        for rec in self:
+            rec.payment_line_ids_count = payment_line_dict.get(rec.id, 0)
+
+    @api.multi
+    def show_payment_lines(self):
+        self.ensure_one()
+        return {
+            'name': _("Payment lines"),
+            'type': 'ir.actions.act_window',
+            'view_mode': 'tree,form',
+            'res_model': 'account.payment.line',
+            'domain': [('mandate_id', '=', self.id)],
+        }
+
     @api.multi
     @api.constrains('signature_date', 'last_debit_date')
     def _check_dates(self):
diff --git a/account_banking_mandate/tests/test_invoice_mandate.py b/account_banking_mandate/tests/test_invoice_mandate.py
index c05bce6c3..5ccf5bcd3 100644
--- a/account_banking_mandate/tests/test_invoice_mandate.py
+++ b/account_banking_mandate/tests/test_invoice_mandate.py
@@ -31,6 +31,7 @@ class TestInvoiceMandate(TransactionCase):
         payment_order.draft2open()
         payment_order.open2generated()
         payment_order.generated2uploaded()
+        self.assertEqual(self.mandate.payment_line_ids_count, 1)
 
     def test_post_invoice_02(self):
         partner_2 = self._create_res_partner('Jane with ACME Bank')
diff --git a/account_banking_mandate/views/account_banking_mandate_view.xml b/account_banking_mandate/views/account_banking_mandate_view.xml
index 64d7c087f..b35b26b2f 100644
--- a/account_banking_mandate/views/account_banking_mandate_view.xml
+++ b/account_banking_mandate/views/account_banking_mandate_view.xml
@@ -23,6 +23,7 @@
                 <field name="state" widget="statusbar"/>
             </header>
             <sheet>
+                <div class="oe_button_box" name="button_box"/>
                 <div class="oe_title">
                     <h1>
                         <field name="unique_mandate_reference"
@@ -44,9 +45,6 @@
                     <field name="scan"/>
                     <field name="last_debit_date"/>
                 </group>
-                <group name="payment_lines" string="Related Payment Lines">
-                    <field name="payment_line_ids" nolabel="1"/>
-                </group>
             </sheet>
             <div class="oe_chatter">
                 <field name="message_follower_ids" widget="mail_followers"/>
@@ -56,6 +54,26 @@
     </field>
 </record>
 
+<record id="views_mandate_form_buttons" model="ir.ui.view">
+    <field name="name">view.mandate.form.buttons</field>
+    <field name="model">account.banking.mandate</field>
+    <field name="inherit_id" ref="account_banking_mandate.view_mandate_form"/>
+    <field name="groups_id" eval="[(6, 0, [ref('account_payment_order.group_account_payment')])]"/>
+    <field name="arch" type="xml">
+        <div name="button_box" position="inside">
+            <button name="show_payment_lines"
+                    help="Payment lines"
+                    class="oe_stat_button"
+                    icon="fa-list"
+                    type="object">
+                <field name="payment_line_ids_count"
+                       widget="statinfo"
+                       string="Payment lines"/>
+            </button>
+        </div>
+    </field>
+</record>
+
 <record id="view_mandate_tree" model="ir.ui.view">
     <field name="name">view.mandate.tree</field>
     <field name="model">account.banking.mandate</field>