To provide a vehicular power seat device allowing solution of a problem of battery consumption of a mobile machine in an switch operation when driving a seat and a problem of a switch long-time pressing operation of the mobile machine.

A vehicle BD is provided with an operation unit 70 (an operation means) having a bringing-out SW 71 and a storage SW 72 (an operation switch) in each of which an on state is held by a single switch operation, for previously instructing a drive mode of the seat 10. The mobile machine 60 is incorporated with a transponder 61 driven by a magnetic field generated by a transpoder transmitter/receiver 40, and wirelessly transmitting an ID code. The transponder transmitter/receiver 40 (a receiver) transmits the ID code from the mobile machine 60 to a collation ECU (Electronic Control Unit) 30 (a collation means). A seat ECU 20 (a seat control means) inputs a control signal from the collation ECU 30, and drives the seat 10 when an on signal of the SW is input from the operation unit 70.