PURPOSE: To improve the cleaning performance by detaching a hanger plate, and to adjust the vertical degree of the front plate.

CONSTITUTION: A drawer 14 is constituted of the front plate 15, the rear plate 16 and the bottom plate 17, and a plate-like hanger plate 18 constituted of a wire rod is detained so as to be freely attachable and detachable from the upper part with respect to a recessed supporting implement 19 whose upper face is opened, provided on the front plate 14 and the rear plate 15 by turning the face of the hanger plate 18 to both sides. The supporting implement 19 is provided with an elastic piece 19b which is elastically deformable in the upper part of the rear face of a recessed part 19a, and shakiness of the hanger plate 18 is prevented. 20 is a bar-like interval adjusting member for adjusting the upper interval of the front plate 15 and the rear plate 16, a screw part 20a of one end is screwed to a female screw 22a of an adjusting tool 20 fixed to a recessed part 21 of the reverse side of the front plate 15, the other end is fitted and attached into an engaging hole 23 formed in the rear plate 15, and by adjusting the screwed length to the female screw 22a of the adjusting tool 22, the upper interval of the front plate 15 and the rear plate 16 can be adjusted.