diff --git a/addons/sale_timesheet/views/project_task_views.xml b/addons/sale_timesheet/views/project_task_views.xml
index 7ca5840394f..d115ca09079 100644
--- a/addons/sale_timesheet/views/project_task_views.xml
+++ b/addons/sale_timesheet/views/project_task_views.xml
@@ -7,8 +7,8 @@
         <field name="inherit_id" ref="hr_timesheet.project_invoice_form"/>
         <field name="arch" type="xml">
             <xpath expr="//page[@name='settings']//field[@name='analytic_account_id']" position="before">
-                <field name="sale_line_id" groups="!sales_team.group_sale_salesman" options="{'no_create': True, 'no_edit': True, 'delete': False, 'no_open': True}"/>
-                <field name="sale_line_id" groups="sales_team.group_sale_salesman" options="{'no_create': True, 'no_edit': True, 'delete': False}"/>
+                <field name="sale_line_id" groups="!sales_team.group_sale_salesman" options="{'no_create': True, 'no_edit': True, 'delete': False, 'no_open': True}" attrs="{'invisible': ['|', ('allow_billable', '=', False), ('partner_id', '=', False)]}"/>
+                <field name="sale_line_id" groups="sales_team.group_sale_salesman" options="{'no_create': True, 'no_edit': True, 'delete': False}" attrs="{'invisible': ['|', ('allow_billable', '=', False), ('partner_id', '=', False)]}"/>
             </xpath>
             <xpath expr="//page[@name='settings']" position="after">
                 <page name="billing_employee_rate" string="Invoicing" attrs="{'invisible': ['|', ('allow_billable', '=', False), ('partner_id', '=', False)]}">