A level conversion circuit is composed of a level shift circuit for supplying
a
level-converted signal in the same phase as the input signal and a signal in the
reverse phase thereto and a follow-up circuit responsive to the earlier of the
output signals of the level shift circuit for generating an output signal, wherein
the follow-up circuit consists of an inverter circuit in which two p-channel type
MOS transistors and two n-channel type MOS transistors are connected in series
between a first voltage terminal and a second voltage terminal, of which one pair
is used as input transistors and the remaining pair of transistors are subjected
to feedback based on the output signal of the level shift circuit to be quickly
responsive to the next variation.