I've tried it as you said to me but i'm still getting the save button

this is my code :

<record id="view_product_inherit_form" model="ir.ui.view">

<field name="name">product.inherit</field>

<field name="model">product.template</field>

<field name="inherit_id" ref="product.product_template_form_view"/>

<field name="arch" type="xml">

<xpath expr='//form[@string="Product"]' position='attributes'>

<attribute name="create">false</attribute>

</xpath>

</field>

</record>

Jihen,

On the form view's form tag, you can specify create='false' which will disallow the end user to create a record.

<form string="somehing" create="false" edit="false" version="7.0">
If you inherit from an existing view:

<record>

.. 

<xpath expr='//form[@string="something"]' position='attributes'>

<attribute name="create">false</attribute>

</xpath> 

</record>

Thanks.