PURPOSE: To obtain the output circuit which can reduce energy consumption.

CONSTITUTION: When an enable signal EN is at a low level, both a Pch transistor 8 and an Nch transistor 9 are turned off. At such a time, a Pch transistor 7 is turned on because an output signal (a) of a NAND gate 6 is at a low level. Thus, an output terminal is pulled up through the Pch transistor 7. On the other hand, when the enable signal EN is at a high level, an output signal OUT having the same phase as an input signal IN is outputted to the output terminal. At such a time, the Pch transistor 7 is turned off because the output signal (a) of the NAND gate 6 is at the high level. Therefore, a through current can be prevented from flowing between a power source VDD and a ground GND, and the energy consumption can be reduced.