To provide a frequency division circuit having a frequency division ratio of an optional fraction.

A counter section 10 is operated, based on a control signal CS1 when a count CNT3 of a counter section 40 is 0-2, and applies 1/5 frequency division to an input signal IN to output a frequency division signal S1. A counter 41 counts up with the frequency division signal S1 given via an OR 30 and when the count CNT3 reaches 3 or 4, the counter section 10 is stopped, a counter section 20 is operated instead to apply 1/6 frequency division to the input signal IN and to output a frequency division signal S2. The frequency division signals S1, S2 are outputted via an OR 30 as an output signal OUT. A desired frequency division ratio (P+Q)/(M×P+N×Q) is obtained by selecting frequency division ratios 1/M, 1/N of the counter sections 10, 20 and output periods P, Q of control signals CS1, CS2 of the counter section 40, where, N are integers being 2 or over and P, Q are integers being 1 or over.