The accident happened around 9:30 pm. PT near the 4300 block of River Road West in Delta.
The woman was rescued, but the man has not been seen since.
Two search and rescue boats and a hovercraft spent two hours searching the Fraser River Sunday night, but could not find the man.
Search and Rescue officials say the woman is in stable condition in hospital after being pulled from the water.
MAP: 4300 block of River Road West, Delta, B.C.