PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of discriminating a connected apparatus and automatically and appropriately turning on and off a power supply for convenient use to users.SOLUTION: An electronic apparatus 1 includes: a connection terminal 39 connectable with other apparatuses 60, Ca; and control means 22 for determining whether a power supply of an own machine should be turned on or off according to the other apparatuses 60, Ca connected with the connection terminal 39 and controlling turning on and off operations of the power supply.