After success as a kart driver, and in the French Formula Renault came Montagny 2004 Formula 1 team Renault, where he worked as a test driver up to and including 2005. On the Friday before the race at the Nürburgring in 2005 Montagny drove a third Jordan. However, no further cooperation was.
In the first two races of the Formula 1 season 2006 he took a position as a reserve driver for the Super Aguri F1 team, but could not deny the Friday practice since Super Aguri had no third ready for use in car. Montagny had after his involvement with the Japanese team, the intention in the Champ Car series contest the season as driver for the Rocket Sports Team. However, the team decided against him, so that Montagny returned as a test driver for Super Aguri at the Grand Prix of Europe and now could be driving a car on Friday. A day before the first free practice then came the surprising message that Montagny would represent the standing of criticism regular driver Yuji Ide for the race. The FIA advised the team to give the Japanese until further testing experience.
After the race at the Nürburgring, the FIA announced that they would withdraw Ide Super Licence. Then, Franck Montagny Super Aguri confirmed for the next two races in Spain and Monaco as a second driver alongside Takuma Satō.
Already in his second race in Monaco, he succeeded by a solid performance in the race retract a good 16th place and thus to beat Takuma Satō in the team-internal duel. He was then officially confirmed F1 team for the next four races as a race driver for Super Aguri. From the Grand Prix of Germany Franck Montagny moved again in the role of test driver and was replaced by Sakon Yamamoto.
2007 Montagny moved as a test driver for Toyota, replacing Brazilian Ricardo Zonta there the who has moved to Renault. For 2008, the Frenchman competed at Force India to a cockpit and participated in test drives. However, the good dashboards went to Giancarlo Fisichella and Adrian Sutil.