DRAIN VALVE

PROBLEM TO BE SOLVED: To easily remove a flat perforated plate from a support member and simply and surely remove the stains such as scale stuck to the flat perforated plate with a toothbrush or the like by connecting the valve cover and the flat perforated plate with the support member, and making the flat perforated plate removable from a drain main body tube together with the valve cover. SOLUTION: This drain valve is provided with a valve cover 2 mounted on a drain port at the upper section of a drain main body tube 1, a support member 3 fixed to the valve cover 2 and suspended in the drain main body tube 1, and a flat perforated plate 4 removable from the drain main body tube 1 together with the valve cover 2 and arranged nearly at the lower end of the support member 3. The support member 3 and the flat perforated plate 4 are removably coupled with each other by the elastic deformation of the support member 3 or the flat perforated plate 4.