Moga MLA Harjot Kamal and two others were injured when their vehicle collided with another car near Doraha in Ludhiana district, officials said on Thursday.
The accident took place on the intervening night of Wednesday and Thursday.
Kamal, a Congress legislator, was returning to Moga after attending the three-day Punjab assembly session in Chandigarh. Kamal dislocated his hip in the accident.
Moga Improvement Trust Chairman Vinod Bansal, who was accompanying Kamal, and the driver of the vehicle also sustained injuries in the accident. Punjab Chief Minister Capt Amarinder Singh wished the Moga MLA and others speedy recovery.