The 2024 Open de Rennes was a professional tennis tournament played on hard courts.

It was the 18th edition of the tournament and part of the 2024 ATP Challenger Tour.

It took place in Rennes, France between 9 and 15 September 2024.

The following players received wildcards into the singles main draw: The following player received entry into the singles main draw using a protected ranking: The following players received entry into the singles main draw as alternates: The following players received entry from the qualifying draw: