If a sealing member is mounted to a planar sealing member-mount extending from a window frame toward outside of the cabin, separation of a terminal portion of the sealing member from the window frame is to be reduced. A fixing member made of a hard material is provided on a terminal portion of the sealing member in a front-rear direction of a vehicle. The fixing member has a body portion, an engagement portion, and a fixing target portion. The body portion is fixed to the terminal portion of the sealing member. The engagement portion holds the planar sealing member-mount in a thickness direction. The fixing target portion is fixed to a portion of the window frame remote from the planar sealing member-mount in the front-rear direction of the vehicle.