An input/output circuit including: a first transistor that, based on an input signal and an enable signal input to an enable terminal that switches a validity and invalidity of an output, drives a load connected between an output terminal and an external power supply; a first switch provided between the input terminal and a control terminal of the first transistor, and including a first switching terminal that switches between connecting or blocking the input signal; and a switch control section that controls the first switching terminal based on the enable signal, wherein, when a logic of the enable signal has transitioned, the switch control section controls the first switching terminal to cause the first switch to be in a connecting state for a predetermined period, to input the input signal to the control terminal of the first transistor, and to suppress a current flowing to the load.