Someone know this font?
Quelqu'un connait le nom de cette police ?

It could be something as simple as Helvetica Bold - http://www.myfonts.com/search/helvetica+bold/fonts/
or as complex as Chalet Book Bold - http://www.houseind.com/fonts/chaletbook

Depends if you know some more of the letters.

Thank you very much! I would manage to find something pretty rough

You are welcome. Not rough - but the letter formations are pretty common - so one has to look for the uncommon letters - I personallyl love capital Rs and Qs.