Abstract: An anchoring system for the seat of a vehicular seat adapted to be rotated between folded and upright positions, having a front anchor bar and a rear anchor bar, both being attached to the floor of the vehicle, the leg having a leg and having front and rear projections for anchoring the seat from the front and rear anchor bars, a profile formed on the bottom of the leg between the first and second projections for an anchor bar sliding in engagement therewith when the seat is moved from its folded position to its upright position, a recess between the first projection and the profile for selective engagement with the rear anchor bar, a catch having a hook for engaging the rear anchor bar, and a support member having two recesses each for fitting at all times about a respective one of the front and said rear anchor bars, in its upright position the seat is being held firm by the anchoring system regardless of the position of the catch.