Dear sergio,

Please use eval-expression function [*1] for testing.
Type "M-: (org-show-siblings)" and "M-: (org-show-entry)".

> org-show-siblings is also not that I want. It show all siblings of all
> expanded levels. And want to change this view:

The combination is maybe your answer. Please find a short clip.
http://dl.dropbox.com/u/2440/worg/Voila_Capture14.mov
I tested with an example org buffer[*2], Emacs24, and Org7.8.02.

Best regards,
Takaaki Ishikawa

[*1] http://www.gnu.org/s/libtool/manual/emacs/Lisp-Eval.html

[*2] an example org buffer
* a
** aa
* b
** d
*** ee
*** e
**** f
**** g
qwe
qwe
***** hhh
***** hh
***** h
- a
- b
***** hhhh
***** hhhhh
**** gg
**** gg
** ddd
* c