DRAINBOARD

PROBLEM TO BE SOLVED: To provide a drainboard bearing a plate without making the plate installed on a sink fall off simply. SOLUTION: A drainboard provides a stage fallen flange section 2a from the upper edge of a sink 2 along the upper edge of the inside of the sink 2, and a counter 1 is projected to the inside of the sink 2 so as to cover the flange section 2a to provide a projection section 1a. A recess section 6 is formed of the projection section 1a and flange section 2a along the flange section 2a, a slide piece 3 capable of sliding along the recess section 6 is opposed at the front side and the rear side of the sink 2 and is projected inward of the sink 2 to freely fit, and a plate 4 is so interlocked with the slide piece 3 through an interlocking device 5 in a detachable manner that the front side and rear side of the sink 2 can be mounted.