Seat

A seat (1) is provided with: a main cushion (15) that receives the load of a seated person; a sub-pad (16) fitted in a recess (17) formed in a surface of the main pad (15) on the opposite side from the surface on which the load is received; a piezoelectric sensor (21) that is disposed on the surface of the sub-pad (16) that receives the load, and that senses the heart impact of the seated person; and an interposing member (23) that is higher than the piezoelectric sensor by a predetermined height, is interposed between the piezoelectric sensor (21) and a bottom surface (17A) of the recess (17) facing the piezoelectric sensor (21), and is disposed so as to be capable of pressing a part of the piezoelectric sensor (21). 座椅(1)具备：主衬垫(15)，承受就座者的载荷；副衬垫(16)，嵌入于在所述主衬垫(15)的相对于承受所述载荷的面相反侧的面形成的凹部(17)；压电传感器(21)，配置于所述副衬垫(16)的承受所述载荷的面，对所述就座者的心冲击进行传感检测；以及从所述压电传感器高出规定高度的夹设构件(23)，介于所述压电传感器(21)和与所述压电传感器(21)相对的所述凹部(17)的底面(17A)之间，配置为能够按压所述压电传感器(21)的一部分。