Abstract: A device for fastening a fixture to a fastening structure of a vehicle including: a base comprising a first clamping jaw which can be positioned in a clamping direction (Z) over the slot and pressed in the clamping direction (Z) with respect to the fastening structure, a second clamping jaw comprising a clamping portion which can be inserted into the fastening channel, and a shaft which projects from the clamping portion; an actuating unit which is supported on the base such that it can be moved back and forth; and a gear system which couples the actuating unit to the second clamping jaw such that a movement of the actuating unit generates the longitudinal movement of the second clamping jaw.