An electronic device according to the present invention includes: at least one heat sensing section (13), which includes a first contact portion (24) and of which a physical property varies responsive to an incoming infrared ray; a detector circuit section, which includes a second contact portion (42) and which senses the variation in the physical property of the heat sensing section (13); and a driving section (112), which is able to change a first state, in which the first and second contact portions (24, 42) are in contact with each other and electrically connected to each other, into a second state, in which the first and second contact portions (24, 42) are out of contact with each other and electrically disconnected from each other, and vice versa.