diff --git a/netforce_clinic/layouts/clinic_prod_form.xml b/netforce_clinic/layouts/clinic_prod_form.xml
index 9cc9294..98b238c 100644
--- a/netforce_clinic/layouts/clinic_prod_form.xml
+++ b/netforce_clinic/layouts/clinic_prod_form.xml
@@ -2,6 +2,7 @@
     <tab string="Other" position="after">
         <tab string="Ratchawat">
             <group form_layout="stacked">
+                <field name="default_qty" span="2"/>
                 <separator string="Product View"/>
                 <field name="patient_types" nolabel="1" span="12">
                     <list>
diff --git a/netforce_clinic/models/hd_case.py b/netforce_clinic/models/hd_case.py
index c63da22..6af5caf 100644
--- a/netforce_clinic/models/hd_case.py
+++ b/netforce_clinic/models/hd_case.py
@@ -458,7 +458,7 @@ class HDCase(Model):
         line['uom_id']=prod.uom_id.id
         line['description']=prod.name
         line['product_categ_id']=prod.categ_id.id
-        qty=1
+        qty=prod.default_qty or 1
         price=prod.sale_price or 0.0
         amt=qty*price
         line['qty']=qty
diff --git a/netforce_clinic/models/product.py b/netforce_clinic/models/product.py
index 36b3fd3..246ccec 100644
--- a/netforce_clinic/models/product.py
+++ b/netforce_clinic/models/product.py
@@ -8,6 +8,7 @@ class Product(Model):
         'departments': fields.One2Many('clinic.department.product','product_id','Departments'),
         'report_visible': fields.Boolean("Report Visible"),
         'account_products': fields.One2Many('clinic.setting.account.product','product_id','Account Products'),
+        'default_qty': fields.Float("Default Qty"),
     }
 
     #TODO