| 2012 Open de Rennes | |
|---|---|
| Date | 8–14 October |
| Edition | 7th |
| Surface | Hard |
| Location | Rennes, France |
| Champions | |
| Singles | |
 Kenny de Schepper | |
| Doubles | |
 Philipp Marx /  Florin Mergea | |
The 2012 Open de Rennes was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Rennes, France between 8 and 14 October 2012.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 SVN | Aljaž Bedene | 90 | 1 |
 AUT | Andreas Haider-Maurer | 100 | 2 |
 BEL | Ruben Bemelmans | 108 | 3 |
| BEL | Olivier Rochus | 110 | 4 |
| FRA | Michaël Llodra | 111 | 5 |
| GER | Matthias Bachinger | 119 | 6 |
| FRA | Florent Serra | 120 | 7 |
| FRA | 122 | 8 |
The following players received wildcards into the singles main draw:
Grégoire Burquier Marc Gicquel Julien Obry Maxime Teixeira The following players received entry from the qualifying draw:
The following players received entry into the singles main draw as a lucky loser:
Kenny de Schepper def. 
Illya Marchenko, 6–3, 6–2 Philipp Marx / Florin Mergea def. 
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