\begin{document}
\tableofcontents
\include{chapter1}
\bibliographystyle{plain}
\bibliography{biblio}
\end{document}

\usepackage[nottoc,numbib]{tocbibind}

the bibliography will appear as a chapter in my document!!

-

To get the bibliography to be listed in the ToC as an unnumbered sectional unit (chapter or section), use tocbibind without the numbib option:

\usepackage[nottoc,notlot,notlof]{tocbibind}

Another option would be to use the etoolbox package to patch \thebibliography to use \addcontentsline:

\documentclass{book}
\usepackage{etoolbox}

\begin{document}
\tableofcontents
\include{chapter1}
\bibliographystyle{plain}
\bibliography{biblio}
\end{document}
-
sorry i want it a chapter in the TOC but without mention in the bibliographie page: Chapter2: Bibliographie – researcher Sep 11 '12 at 19:12
@researcher please see my updated answer. – Gonzalo Medina Sep 11 '12 at 19:57
i have used the second solution because the first one appear the listoffigures and list of table in the TOC – researcher Sep 11 '12 at 20:08
@researcher you can use the notlot, notlof options; see my updated answer. – Gonzalo Medina Sep 11 '12 at 20:10
ok, i have tested the first solution, it works, thank you :) – researcher Sep 11 '12 at 20:14

A very easy way is to include following line before the bibliography starts, at the end of the document.