Montreal police said witnesses saw the vehicle run a red light while heading north on Décarie Boulevard at about 10 p.m. near the Van Horne Avenue intersection.
The car struck a cyclist, a man in his 40s, heading west on Van Horne Avenue.
Police said the driver immediately stopped to help the cyclist, who was rushed to hospital.
Investigators met with the driver on the scene.
Police said he could be facing charges.
Alcohol and speed were not factors in the incident, according to Montreal police.