To solve the problem of a conventional power transmitter where power supply to a terminal is interrupted when a decision is made that the primary current on the body side is an over current in order to secure safety and since a user has no means for confirming the primary current directly, a long time passes before abnormality of primary current is noticed and recovery work can not be started quickly.

The power and signal transmitter controlling power supply to the terminal 2 depending on the primary current on the body 1 and communicating a signal between the body 1 and the terminal 2 is provided with a display 9 on which a user can confirm the magnitude of the primary current.