Abstract: A seat riser for use with a motor vehicle of the type having longitudinally spaced and laterally extending front and rear floor mounted strikers to removably mount the associated seat in the vehicle. The riser includes a longitudinal frame structure, a fork member at the front of the frame structure having a downwardly opening slot for receipt of the front floor striker, mounting means at the rear of the frame structure defining an obliquely upwardly and rearwardly extending ramp edge adapted to be positioned above and forwardly of the rear striker, and a latching mechanism operative to move the ramp edge downwardly and forwardly with respect to the rear striker and urge a latching edge defined by the fork structure at the front of the riser resiliently against the rear of the front striker in response to movement of said latching mechanism from a latched to a locked position.