A seat device for a vehicle and a control method thereof are provided. The seat device for the vehicle includes: an electric device for moving a seat of the vehicle; a pinch detection unit that detects a pinched obstacle by detecting a load change of the electric device when the seat moves; and a control unit that causes the electric device to perform a reverse operation when the pinch detection unit detects that the obstacle is pinched, so as to cause the seat to reversely move. A reverse movement amount by which the seat is reversely moved is determined based on a time from when the load change starts to when the pinch detection unit detects that the obstacle is pinched.

A curve estimation unit estimates, when a DC motor stops rotation through a braking operation by stopping supply of a drive current to the DC motor and applying a same potential to both terminals of the DC motor, an attenuation characteristic curve of an induced current from start of the braking operation to stop of the rotation of the DC motor, based on the induced current flowing through the DC motor in the braking operation. A time estimation unit estimates a time required from the start of the braking operation to the stop of the rotation of the DC motor. A rotation amount estimation unit estimates the rotation amount of the DC motor in the braking operation based on an integral value obtained by integrating the induced current over the time as estimated according to the attenuation characteristic curve of the induced current as estimated.