To provide a laser diode output control device capable of stable signal recording despite the temperature of an optical disk.

A recording reference level is recorded in a set value storage means 52 by a trial lighting action. At the time of actually recording on an optical disk 28, a recording level setting means 50 is adjusted so that the recording laser beam is at the optimum recording output, in a recording level adjusting circuit 58, by the recording reference level stored in the set value storage means 52 and by a temperature signal near the present optical disk 28 from a temperature sensor 26. In a recording level signal forming means 54, on the basis of the output of the adjusted recording level setting means 50, a signal that is necessary for the optimum recording level is formed, an output at the time of reproduction is added by an adder, thereby a driving current supply circuit is controlled.