To change easily a detection range of a physical quantity.

In this capacitive type physical quantity detection device equipped with a sensor element 1 having the capacity changing corresponding to the change of the physical quantity and a C-V conversion circuit 3 for converting the capacity change of the sensor element 1 into a voltage, the C-V conversion circuit 3 with a switched capacitor constitution has an operation amplifier 31, a switch S0 installed between input-output terminals of the operation amplifier 31, plural feedback capacitors 321-324, and switches S1-S5 for selecting the feedback capacitor connected in parallel with a switch S0 from among the plural feedback capacitors 321-324. An external signal is decoded by a decoder 7 and one of the switches S1-S5 is switched to the ON state, to thereby connect in parallel the desired feedback capacitor with the switch S0.