To realize a counting circuit capable of high speed operation with the reduced circuit size and with easy circuit control, and possessing a function of automatically correcting an internal state thereof.

There are provided a shift register 1Y for outputting a count- down signal 20, a counter set signal 60, and a counter reset signal 70 in response to a certain counting signal, an up-down counter 2 for outputting a counter value 40 in response to a count signal 10 being a count-up signal and the count- down signal, and a condition comparator 3 for comparing the counter value 40 and a threshold 30.