diff --git a/share/tryton/tryton.glade b/share/tryton/tryton.glade
index 5b794b0278..ef9c101437 100644
--- a/share/tryton/tryton.glade
+++ b/share/tryton/tryton.glade
@@ -1339,7 +1339,7 @@
               <widget class="GtkToolButton" id="but_attach">
                 <property name="visible">True</property>
                 <property name="tooltip" translatable="yes">Add an attachment to this resource</property>
-                <property name="label" translatable="yes">Attachment</property>
+                <property name="label" translatable="yes">Attachment(0)</property>
                 <property name="use_underline">True</property>
                 <property name="stock_id">gtk-paste</property>
                 <signal name="clicked" handler="on_but_attach_clicked"/>
diff --git a/tryton/gui/main.py b/tryton/gui/main.py
index bae7595b2d..216d542eaa 100644
--- a/tryton/gui/main.py
+++ b/tryton/gui/main.py
@@ -793,19 +793,26 @@ class Main(object):
         self.pages.append(page)
         self.notebook.append_page(page.widget, gtk.Label(page.name))
         self.notebook.set_current_page(-1)
+        page.signal_connect(self, 'attachment-count', self._attachment_count)
 
     def sb_set(self, view=None):
         if not view:
             view = self._wid_get()
         for i in self.buttons:
             if self.buttons[i]:
-                self.buttons[i].set_sensitive(bool(view and (i in view.handlers)))
+                self.buttons[i].set_sensitive(
+                        bool(view and (i in view.handlers)))
+
+    def _attachment_count(self, widget, signal_data):
+        label = _('Attachment(%d)') % signal_data
+        self.buttons['but_attach'].set_label(label)
 
     def _win_del(self):
         page = int(self.notebook.get_current_page())
         if page != -1:
             self.notebook.disconnect(self.sig_id)
             page_widget = self.pages.pop(page)
+            page_widget.signal_unconnect(self)
             self.notebook.remove_page(page)
             self.sig_id = self.notebook.connect_after('switch-page',
                     self._sig_page_changt)
diff --git a/tryton/gui/window/form.py b/tryton/gui/window/form.py
index 70d62d2f99..2ddc1ecbca 100644
--- a/tryton/gui/window/form.py
+++ b/tryton/gui/window/form.py
@@ -15,16 +15,18 @@ from tryton.gui.window.preference import Preference
 from tryton.gui.window.win_export import WinExport
 from tryton.gui.window.win_import import WinImport
 from tryton.gui.window.attachment import Attachment
+from tryton.signal_event import SignalEvent
 
 _ = gettext.gettext
 
 
-class Form(object):
+class Form(SignalEvent):
     "Form"
 
     def __init__(self, model, res_id=False, domain=None, view_type=None,
             view_ids=None, window=None, context=None, name=False, limit=80,
             auto_refresh=False):
+        super(Form, self).__init__()
         if not view_type:
             view_type = ['tree', 'form']
         if domain is None:
@@ -52,6 +54,8 @@ class Form(object):
                 window=self.window, limit=limit, readonly=bool(auto_refresh),
                 form=self)
         self.screen.signal_connect(self, 'record-message', self._record_message)
+        self.screen.signal_connect(self, 'attachment-count',
+                self._attachment_count)
         self.screen.widget.show()
 
         if not name:
@@ -338,6 +342,9 @@ class Form(object):
         cid = statusbar.get_context_id('message')
         statusbar.push(cid, msg)
 
+    def _attachment_count(self, screen, signal_data):
+        self.signal('attachment-count', signal_data)
+
     def modified_save(self, reload=True):
         if self.screen.is_modified():
             value = common.sur_3b(
diff --git a/tryton/gui/window/tree.py b/tryton/gui/window/tree.py
index 833d4ebe53..dcb980ca83 100644
--- a/tryton/gui/window/tree.py
+++ b/tryton/gui/window/tree.py
@@ -10,14 +10,16 @@ from tryton.gui.window.win_export import WinExport
 from tryton.config import GLADE
 from window import Window
 from tryton.action import Action
+from tryton.signal_event import SignalEvent
 
 _ = gettext.gettext
 
-class Tree(object):
+class Tree(SignalEvent):
     "Tree page"
 
     def __init__(self, model, res_id=False, view_id=False, domain=None, context=None,
             window=None, name=False):
+        super(Tree, self).__init__()
         if domain is None:
             domain = {}
         if context is None:
diff --git a/tryton/gui/window/view_form/model/record.py b/tryton/gui/window/view_form/model/record.py
index aa0c9ee3b0..e4299f0e9e 100644
--- a/tryton/gui/window/view_form/model/record.py
+++ b/tryton/gui/window/view_form/model/record.py
@@ -36,6 +36,7 @@ class ModelRecord(SignalEvent):
         self.modified = False
         self.modified_fields = {}
         self.read_time = time.time()
+        self.attachment_count = -1
         for key, val in self.mgroup.mfields.items():
             self.value[key] = val.create(self)
             if (new and val.attrs['type']=='one2many') \
@@ -239,3 +240,12 @@ class ModelRecord(SignalEvent):
         for index, fname, value in values:
             data[fname] = value
         self.set_default(data)
+
+    def get_attachment_count(self):
+        if self.attachment_count < 0:
+            ir_attachment = RPCProxy('ir.attachment')
+            self.attachment_count = ir_attachment.search_count([
+                ('res_model', '=', self.resource),
+                ('res_id', '=', self.id),
+                ])
+        return self.attachment_count
diff --git a/tryton/gui/window/view_form/screen/screen.py b/tryton/gui/window/view_form/screen/screen.py
index d257901087..e875c38975 100644
--- a/tryton/gui/window/view_form/screen/screen.py
+++ b/tryton/gui/window/view_form/screen/screen.py
@@ -166,6 +166,10 @@ class Screen(SignalEvent):
             len(self.models.models or []) + offset,
             self.search_count,
             value and value.id))
+        attachment_count = 0
+        if value:
+            attachment_count = value.get_attachment_count()
+        self.signal('attachment-count', attachment_count)
         return True
     current_model = property(_get_current_model, _set_current_model)