An A/D converter includes an integrator having an operational amplifier, a first feedback capacitor, and a second feedback capacitor, a quantizer outputting a quantization result of an output signal of the operational amplifier, and a D/A converter having a D/A converter capacitor. The D/A converter capacitor has a first terminal connected to an input terminal of the operational amplifier and a second terminal connected to an output terminal of the operational amplifier. The D/A converter performs a subtraction operation by repeating subtraction of charges accumulated in the first and second feedback capacitors based on the quantization result, and performs a cyclic operation by sequentially repeating subtraction and amplification of the charges accumulated in one of the first and second feedback capacitors based on the quantization result.