An optical pickup actuator includes a; a bobbin in which a through hole is
formed, an objective lens attached to the bobbin; a holder provided on
the base to support the bobbin; a lens holder inserted in the through
hole of the bobbin to support the objective lens, wherein the lens holder
is made of a material having a heat conduction coefficient lower than
that of the bobbin, a plurality of suspensions, each having one end
coupled to the bobbin and the other end attached to a holder provided on
a base, to support the bobbin capable of suspending, and a driving unit
having a coil installed at the bobbin and a magnet installed on the base
to drive the bobbin with an electromagnetic force generated by the
interaction of current flowing in the coil and a magnetic field formed by
the magnet.