Abstract: A drain plug device is provided with a plug lid, a mounting member inserted in an overflow port, an operation handle provided corresponding to an opening of the mounting member at one end thereof so as to protrude from a surface of a sidewall, a transmission member configured to transmit a driving force generated by a pivoting operation of the operation handle to the plug lid side, and a handle moving mechanism capable of moving the operation handle. The handle moving mechanism is configured to make an amount of protrusion of the operation handle with respect to the surface of the sidewall when the drain port is open smaller than an amount of protrusion of the operation handle with respect to the surface of the sidewall when the drain port is closed. Whereby a good draining efficiency at the overflow port side is secured when draining is performed therethrough.