I thank you Andrea, and Nick, 

Andrea, you are probably right. Is it a way to automatically save the .org file in utf8 ? In my emacs the encoding is utf8 by default. 

Best wishes,

Jo. 


2013/12/27 Andrea Rossetti <andrea.rossetti@gmail.com>
Joseph Vidal-Rosset <joseph.vidal.rosset <at> gmail.com> writes:

>
> Hello,
> I do not succeed to solve this problem of accent with pdflatex : 
>

 Shot in the dark: could it be that the encoding of your
org file needs to be saved in utf8 in order to generate a utf8
latex file? Regards, Andrea