PURPOSE: To generate no difference of automatic channel selection sensitivity between a traffic information station and an FM broadcasting station, by constituting so as to generate a stop signal is generated when a receiving signal level is detected, and said level is a prescribed value or above, and also has passed out of a detuning state.

CONSTITUTION: Since an output of a meter driving circuit 11 is in proportion to a level of a receiving signal, a transistor Q4 is turned on only when this receiving signal level is a prescribed value or above. Accordingly, a transistor Q2 is turned on only when a transistor Q1 is off and the transistor Q4 is on, and it is realized when the receiving signal level has passed out of a detuning state and has become a prescribed value or above. In this state, when a pilot signal exists and an automatic channel selecting operation stop signal is generated in a controller 5 for the first time, channel selection of a traffic information station can be executed. In this case, when a resistance R7 of the voltage dividing circuit is varied as desired, an on-level of the transistor Q4 against the receiving signal level becomes adjustable, and the sensitivity for generating the automatic channel selecting operation stop signal is adjusted.