To easily adjust the height, protruded from the surface of an instrument panel, of stopper rubber fitted to the instrument panel of a vehicle.

A glove box outer case 3 is fixed to an instrument panel 1 of a vehicle. The glove box outer case 3 is provided with a weld nut 6, and a screw 14 fitted into a stepped recessed part 11 of a body 12 in stopper rubber 10 is screwed into the weld nut 6 to suitably bend an annular thin-walled part 13 of the stopper rubber 10, thus adjusting the protruding quantity of the stopper rubber 10 from the glove box outer case 3 to a glove box 4.