Automobile seat

A backseat (10) has a seat cushion (11) and a seat back (14). The seat cushion (11) is divided into a movable block (12) and a stationary block (13). When turning forward the seat (14) in a horizontal position to expand a luggage compartment (2), the stationary block (13) that does not obstruct turning the seat back (14) is left unmoved and the movable block (12) normally set at a first position is shifted to a second position in front of and on a level below that of the first position. The movable block (12) does not obstruct the sliding and reclining operations of a front seat disposed in front of the backseat.