A connector unit configured to electrically connect an electric power source and an electric apparatus receiving an electric power supply from the electric power source, the connector unit comprising: an inserting connector connected to the electronic apparatus; and a receiving connector connected to the electric power source; wherein the inserting connector includes two electric power plug terminals (11, 12) made of a conductor, the conductor being configured to receive the electric power supply; and a control plug terminal configured to be extended and retracted in an inserting direction; the receiving connector includes two electric power jack terminals (21, 22) corresponding to the electric power plug terminals (11, 12); and a control jack terminal corresponding to the control plug terminal; the control jack terminal includes two control switches (31, 32) connected to the two electric power jack terminals (21, 22); the receiving connector is configured to supply electric power from the electric power source to the electric power jack terminals (21, 22) via the two control switches (31, 32); and contacts (36, 37, 38, 39) of the two control switches (31, 32) are configured to be connected by extending the control plug terminal in the control jack terminal in the inserting direction in a state where two electric power plug terminals (11, 12) and the two electric power jack terminals (21, 22) are engaged with each other, so that the electric power is supplied to the electronic apparatus; characterised in that, in the receiving connector, an insulation spring is provided between the two control switches (31, 32) and the control plug terminal; and the insulation spring is configured to be bent by inserting the control plug terminal in the inserting direction so that the contacts (36, 37, 38, 39) of the control switches (31, 32) are connected. an inserting connector connected to the electronic apparatus; and a receiving connector connected to the electric power source; wherein the inserting connector includes two electric power plug terminals (11, 12) made of a conductor, the conductor being configured to receive the electric power supply; and a control plug terminal configured to be extended and retracted in an inserting direction; the receiving connector includes two electric power jack terminals (21, 22) corresponding to the electric power plug terminals (11, 12); and a control jack terminal corresponding to the control plug terminal; the control jack terminal includes two control switches (31, 32) connected to the two electric power jack terminals (21, 22); the receiving connector is configured to supply electric power from the electric power source to the electric power jack terminals (21, 22) via the two control switches (31, 32); and contacts (36, 37, 38, 39) of the two control switches (31, 32) are configured to be connected by extending the control plug terminal in the control jack terminal in the inserting direction in a state where two electric power plug terminals (11, 12) and the two electric power jack terminals (21, 22) are engaged with each other, so that the electric power is supplied to the electronic apparatus; characterised in that, in the receiving connector, an insulation spring is provided between the two control switches (31, 32) and the control plug terminal; and the insulation spring is configured to be bent by inserting the control plug terminal in the inserting direction so that the contacts (36, 37, 38, 39) of the control switches (31, 32) are connected.