PURPOSE: To provide a video detection circuit which can reduce the production cost, the power consumption, and the installing space.

CONSTITUTION: When the switches SW1 end SW2 select the terminals (a) respectively, the AM intermediate frequency signals of a tuner 4 is supplied to a phase detector 10 and an AM detector 8. Thus the AM intermediate frequency signal is outputted through an output terminal OUT2 after the PLLAM detection. Meenwhile a VCO 12 is locked in accordance with the FM intermediate frequency signal when the switches SW1, and SW2 select the terminals (f) respectively. As a result, the frequency control voltage of the VCO 1.2, i.e., the output signal of an LPF 11 is outputted through an output terminal OUT1 as the FM detection output.