CAPACITANCE DETECTION DEVICE AND INPUT DEVICE

The capacitance detection device 2 includes a first voltage output circuit configured to output a first alternating current voltage supplied to a shield electrode Ea provided proximate to a detection electrode Es, a second voltage output circuit configured to output a second alternating current voltage V2 whose frequency and phase are the same as that of the first alternating current voltage V1 and whose amplitude is less than that of the first alternating current voltage V1, and a current output circuit 23 configured to output a driving current Is to the detection electrode Es so that the difference between the voltage of the detection electrode Es and the second alternating current voltage V2 becomes smaller, and output a detection signal Vo corresponding to the driving current Is. The second voltage output circuit outputs a second alternating current voltage V2 whose amplitude is adjusted so that the driving current Is in the absence of the object 6 proximate to the detection electrode Es.