A noise shaping circuit includes a first degree noise shaping arrangement in which a quantization error component at a first quantizer adapted for quantizing input signals is fed back to an input side, and in which a quantization error component at the first quantizer is fed back by a predetermined feedback circuit to an input of the first quantizer. The feedback circuit includes a synthesizing unit supplied with an error signal from a first quantization error output unit, a second quantizer for quantizing an output signal from the synthesizing unit, a second quantization error output unit for taking out a quantization error at the second quantizer, a transfer characteristic unit having predetermined transfer characteristics, and a differentiation unit supplied with output signals from the second quantizer. Error signals from the second quantization error output unit are supplied to the transfer characteristic unit, the output of which is supplied to the synthesizing unit.