PURPOSE: To completely seal up a gap between an opening part in a vehicle body, in which an attachment fixture such as a carrier is locked, and a for sash.

CONSTITUTION: The front end of an outer seal lip 16 of a weather strip 11 is fitted in the outer peripheral part of a door sash 2 is made into close contact with an opening part 5 in a vehicle body. An attachment fixture 8 such as a carrier is locked to a roof side rail 10 constituting the vehicle opening part 5. Thick wall parts 16b are formed in the outer seal strip 16 before and after a close contact part 16a of the outer seal strip 16 with respect to the vehicle outboard side surface of the attachment fixture 8. When the door is closed, the thick wall part 16b of the outer seal strip 16 is made to closely contact the door from the roof side rail to an end face of the attachment fixture 8.