To solve a problem that electric power for a clock signal charging/discharging inside a flip-flop circuit is relatively large.

The flip-flop circuit 300 is provided with a master latch circuit 310 which latches input data according to the clock signal. A first input inverter 401 in the master latch circuit 310 inverts the input data. A second input inverter 402 inverts output data from the first input inverter 401. The first input inverter 401 is provided with a first and second push-pull transistors M31, M32 which receive input from a prestage in parallel, and a first control transistor M33 which controls conductive/non-conductive state between a first node Na and a predetermined fixed potential. The second input inverter 402 has the same structure.