Brest will receive 20 tramsets to be used on a 14.3km rail line, which is scheduled to open in mid-2012.
Dijon will receive 32 tramssets for a 20km rail line that is scheduled to open in early 2013.
The 32m-long low-floor vehicles feature air-conditioning, a video surveillance system and on-board visual and audio information and can accommodate 200 passengers.
The vehicles generate five decibels less noise than motor traffic, are 98% recyclable and consumes 10% less energy than a traditional tram, the company said.
The cities have chosen to place the joint order to streamline their investments.