Vehicle seat provided with a reinforcement that allows pelvis adjustment in order to improve the comfort of the passenger

The seat (1) has a base (3) provided with a recess, and a backrest (2) provided with a reinforcement (4) possessing an apex (S) at which back of an occupant of the seat contacts. Height (h) and depth (p) of the apex are measured with respect to an original point (O) of the seat as distance between the apex and an inclination axis of the base and distance between the apex and an inclination axis of the backrest by a measurement protocol. The recess is measured by applying force of 50 Newtons on a disk with 20 mm diameter.