| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain valve device firmly attachable and easily replaceable an existing drain valve with chain. SOLUTION: In this drain valve device for opening and closing a drain valve by transmitting the operation of an operation button part to the drain valve provided on a bottom face of a bathtub, a plate 11 for attaching the operation button is mounted and fixed on an inner wall face 1b of the bathtub by a locking member 12 fixed on the inner wall face 1b of the bathtub by a screw 13 and doubled-sided tapes 19a, 19b, 19c.
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