A seat cushion pad and a seat which enable reduction of a cost and improvement of use feeling are provided. The cushion pad (20) fixed in a seat frame (21) of the seat (1) includes a cushion pad body (31), and an air cell (30) which can be expanded and contracted by supplied/exhausted air. The air cell (30) is provided integrally with the cushion pad body (31) and is held by the cushion pad body (31).