terminal connected to the ground in order to set the potential vh of the body of each of the first and second pmos transistors 1 and 2 referred to the potential of the source of each of the first and second pmos transistors 1 and 2 the body potential generating circuit 10 disposed in the soi cmos circuit according to the third embodiment of the present invention shown in fig7 can generate a body potential having a certain value intermediate between the power supply potential vdd and a value obtained by subtraction of the built in potential vbl from the power supply potential vdd and apply the body potential to the bodies of the first and second pmos transistors 1 and 2 by varying the on off times of the pmos transistors 11 and 12 disposed therein which are turned on and off alternately to be more specific by varying the on off times of the pmos transistors 11 and 12 the body potential generating circuit sets the body potential of each of the first and second pmos transistors 1 and 2 to a potential having a certain value intermediate between a line vh vdd and another line vh vdd u2212 vbl as shown in fig8 the vertical axis of fig8.