To inhibit causation of troubles such as the over discharge of a battery even when keeping for a long term an agricultural implement having an electric controller for the agricultural implement on a condition attached on a tractor.

There is provided an electric controller for an agricultural implement, wherein, the electric controller has a control unit 3 controlling an electric operation part 20 and set at the agricultural implement 2 side and an operation part 4 set at the tractor side where an operator performs operation direction of the control unit 3, and a switch 32 connecting or disconnecting conduction from the power source of the tractor 1 side to the control unit 3 is set on the control unit 3 set at the agricultural implement 2 side.