Mounting device for a vehicle seat and vehicle seat

The device has a mounting unit for arranging a seat element (2) of a seat (1) in a vehicle. A shifting device (5) is mounted on a rotary unit (4) and displaces the mounting unit with respect to the rotary unit on a front side of the rotary unit in a traveling direction when the shifting device is in an untwisted state and mounted state in a vehicle. A pivoting unit has two pivoting levers arranged between a base (3) and the mounting unit such that the pivoting levers are commonly pivoted and laterally displaces the mounting unit.