To provide an installing device for a mirror plate which can easily and precisely install a mirror plate on a drawer main body so that, as a result, the drawer stays well and the appearance and the quality of the furniture is improved by adjusting the position of the mirror plate on the shut drawer by adjusting sideways tilt of the mirror plate.

An installing device to secure the mirror plate to a front surface plate of the drawer main body comprises adjustment jig main bodies 1 to be mounted on both sides of the front surface plate respectively, connection devices 10 to be mounted on both sides of the mirror plate, and fixtures 20 and adjustment bodies 30 to be mounted on each of the adjustment jig main bodies 1. On the connection device 10 there is projected a pinching bar to be inserted into the air gap in the adjustment jig main body 1. At the same time, the connection device 10, which is rotatably shaft-supported to the adjustment jig main body 1 by the fixture, rotates the adjustment body mounted on the pinching bar, thereby independently moving both sides of the mirror plate vertically for adjustment by an operation element projected and deviated from the rotary center of the adjustment body.