 and can set the bias power to be equal to the reproduction power, can be obtained. According to Claim 0 of the present invention, there is provided a laser control apparatus which controls a power of a semiconductor laser in an optical recording/reproducing apparatus for performing recording/reproduction into/from an optical disk by a semiconductor laser, comprising: a photodiode for detecting a light of the semiconductor laser; a current/voltage conversion circuit for converting a current of the photodiode to a voltage, and outputting the voltage; a reference voltage source for deciding a reproduction power of the semiconductor laser; an error amplifier for amplifying a difference between the output voltage of the current/voltage conversion circuit and the reference voltage; a current source for passing a current through the semiconductor laser; a D/A conversion circuit for deciding a current to be passed through the semiconductor laser; a switch means for selectively switching a control signal of the current source to switch between an output of the error amplifier and an output of the D/A conversion circuit; an