A neuron circuit includes: an input terminal to which spike signals are continuously input; a first switch element that has a first end coupled to the input terminal and a second end coupled to a node, remains in a high resistance state even when a single spike signal is input, and goes into a low resistance state when spike signals are input within a time period; a feedback circuit coupled to the node, and causing the input terminal to be at a level when the first switch element goes into the low resistance state; and a second switch element that is connected in series with the first switch element between the input terminal and the node, remains in a low resistance state even when spike signals are input to the input terminal, and goes into a high resistance state when the input terminal becomes at the level.