A glass run includes an outer side wall, an inner side wall and a bottom wall, which define a generally U-shaped cross-section. A first outer seal lip and an inner seal lip are respectively formed in the outer side wall and the inner side wall. An extension part is formed to extend from an open end of the outer side wall of the glass run for attachment to vertical side portions of the door frame in an extending direction thereof, and a second outer seal lip is formed to extend from a tip end of the extension part in a direction of a front side of a vehicle body such that the second outer seal lip seals the door glass on a front side of a part sealed with the first outer seal lip.