A drive of a variable valve lift mechanism for driving a control shaft
controlling a variable valve lift mechanism provided between an engine
valve and an engine valve operating cam in order to change lift amount of
the engine valve, comprises: a rotational force generating actuator;
power conversion means for converting a rotational force of the
rotational force generating actuator into a pivoting force of the control
shaft; and a casing containing the power conversion means with the
rotational force generating actuator coupled to an outer face of the
casing. One end of the control shaft protrudes outward from one side of
an engine body. The casing into which one end of the control shaft is
inserted is attached to the one side of the engine body through fixing
means which can be repeatedly attached and detached. Thus, it is possible
to avoid the engine body from being complex and improve maintainability.