Sliding device

The present disclosure provides a sliding device capable of reducing a difference between a calculated position and an actual position of a movable rail. One aspect of the present disclosure is a sliding device having: a movable rail mounted on a seat provided in a vehicle; a fixed rail that slidably supports the movable rail; a drive unit that slides the movable guide rail, and a control unit that controls the control unit of the drive unit. The drive unit has: a rotation mechanism that conveys the movable rail relative to the fixed rail; and a motor configured to provide power to the rotating mechanism. The control unit includes: an acquisition unit configured to acquire a pulse of the motor; and a calculation unit that calculates the position of the movable rail on the basis of a seat operation pulse among the pulses acquired by the acquisition unit, the seat operation pulse being a pulse when the rotational speed of the motor is equal to or less than a predetermined value. 本公开提供一种能够减小可动导轨的计算位置与实际位置之间的差异的滑