Abstract: An aircraft seat includes a seat cushion and a seat back. The seat cushion has a rear portion along the seat back and a front portion of complementary shape to the rear portion to form a complete seat cushion. The rear portion moves between a raised position and a lowered position. A coupling arrangement connects the front portion to the rear portion so that when the front portion is in the raised position along the seat back the front portion is in the lowered position, in which at least part of it is retracted under the rear portion. When the rear portion is in its lowest position along the seat back the front portion is in a raised, advanced position at the same height as the rear portion to form therewith the seat cushion of the seat for receiving a seated passenger.