
Bourdais will be team-mate to rookie Sebastian Buemi.
British racing driver Jenson Button had been linked to Toro Rosso but the team’s decision to keep Bourdais means he will have to look elsewhere now.
Toro Rosso team principal Franz Tost explained that the team are expecting Bourdais to make good use of his experience last year.
Much of last season’s glory had gone not to Bourdais but to former team-mate Sebastian Vettel, who has gone up to the main Red Bull team with Mark Webber for this year.