A glass runner seal can be fitted to a door with a door glass. The upper portion of the glass run channel includes a main body provided with an inner side wall portion and formed to have a substantially U-shaped cross section, a pair of sealing lips forming a seal against the door glass, a pair of engaging protrusions provided on the inner side wall portion And a curved portion provided on the inner side wall portion between the two engaging protrusions, and a bending portion adapted to be engaged with the engaging recess of the fixing member. Thus, when the glass run channel is mounted, the bent portion is bent so as to project toward the inside of the vehicle, the engaging projection is inserted into the fixing member, and then, by releasing the bending state, the two engaging projections are fitted into the engaging recesses, respectively.