a controlling device for an automobile motor driven antenna including a motor for extending and retracting an antenna by the power from a battery , and a control circuit for controlling the power . the control circuit includes a current detector for detecting the power flowing into and out of the motor and a current breaker which breaks the current when it is over a predesignated level so that a pair of relay contacts in the circuit changes the direction of the current so that the motor may make a forward or reverse rotation for extending or retracting the antenna and automatically make a stop of such rotation .