A glass run is provided in which a main body of a glass run is provided with an exterior side wall, an interior side wall and a bottom wall, an interior holding lip to be locked in a recess on a door frame is provided on an external surface of each interior side wall of extruded portions of the glass run, while interior holding lips on the corner portions are formed in substantially an L-shape to be angled to match the corner portion such that a distal end of the interior holding lip continues to an interior holding lip on a vertical side portion whereas a distal end of the other interior holding lip continues to an interior holding lip on an upper side portion, and the rigidity of the interior holding lips on the corner portion is made smaller than the interior holding lips on the extruded portions.