Abstract: A bottom fixed layer 110, displacement layer 125, and top fixed layer 130 are fixed in a layered structure by way of intervening pedestals 145, 155, which serve as spacers between the layers. The bottom and top fixed layers 110, 130 are rigid dielectric substrates. The displacement layer 125 is a flexible conductive substrate. On the top of the bottom fixed layer 110 are formed an electrode E11 on the right, electrode E12 on the left, and a washer-shaped electrode E15 in the middle. On the bottom of the top fixed layer 130 are formed an electrode E21 on the right, electrode E22 on the left, and a washer-shaped electrode E25 in the middle. These electrodes and the displacement layer 125 together form capacitance elements C11 to C25. When acceleration acts on the working body 160, the displacement layer 125 is displaced and a change in capacitance occurs in various capacitance elements.