To provide an automobile seat having a headrest assembled with a front pillow part with a favorable texture to be pushed frontward of a rear pillow part and, when there is no occupant in the back, constituted to expand and secure the rear visual field of a driver.

The headrest 1 whose rear pillow part 1b is retained to a headrest stay 1c and front pillow part 1a is assembled to be pushed frontward of the rear pillow 1b is erectingly installed at the crown part of the seat back 2 so as to adjust its height by the headrest stay 1c, the front pillow part 1a has a prescribed area shape capable of supporting a seating person from the head part to the neck part, while the rear pillow part 1b has a narrow longitudinal width with its bottom face relatively lifted from the front pillow part 1a, and the headrest 1, when the front pillow part 1a is pushed frontward, changed into an approximately doglegged shape in the side view is lowered to the crown face of the seat back 2 by the rear pillow part 1b so as to adjust its height to a lower position.