The present disclosure improves sealing properties between a glass run and a sealing member provided at an inner peripheral flange of a belt line, if the sealing member of the belt line and the glass run are individual members, to provide high sound insulation properties. The belt line sealing member includes an upper sealing lip and a lower seal lip, which are vertically spaced apart from each other. At an end of the belt line sealing member, a molded part is continuously provided from the upper sealing lip through an inner wall to the lower sealing lip.