A voltage monitoring device monitors voltage of a battery pack having a plurality of battery cells connected in series. This device is provided with a capacitor circuit including a pair of independent terminals, a plurality of capacitors connected in series between the pair of independent terminals, and at least one connecting terminal arranged between adjacent capacitors of the capacitors. In the device, first input-side switches connect the pair of independent terminals to first electrode terminals of the battery cells, and second input-side switches connect the connecting terminal to second electrode terminals among the electrode terminals other than the first electrode terminal. The first electrode terminals are arranged at a predetermined interval that covers a predetermined number of the electrode terminals corresponding to the number of the connecting terminal. The number of the second input-side switches is less than the number of the electrode terminals other than the first electrode terminals.