To eliminate the possibility of movement in the longitudinal direction and generation of back lash by improving mounting stability.

In a state where mounting is completed, since the insides formed into U shapes in section of an upper end 1a and a lower end 1b of a glass inner 1 are formed a little narrower than the thickness of the trim outer upper part D21 and a trim outer lower part D22, the trim outer upper part D21 and the trim outer lower part D22 are pinched by the upper end 1a and the lower end D22 in the elastic contact state, the forming error of a door trim D is absorbed, and the stable attaching state can be secured. Since the trim outer upper part D21 and the trim outer lower part D22 are elastically pinched by the upper end 1a and the lower end 1b of the glass inner 1, they are not moved in the longitudinal direction, and backlash is not generated.