A light-emitting element drive circuit is provided whereby level variation of the drive current can be suppressed. This circuit is provided with a detection circuit 4 that detects the DC current component I6′ of high-frequency current I4 (I5) flowing through a second current mirror circuit 2, and an adjustment circuit 5 that subtracts the DC current component I6′ detected by the detection circuit 4 from the DC current I1 (I7) flowing through line 1B of first current mirror circuit 1. Thus, level variation of the drive current IL′ which represents the superposition of the DC and high-frequency can be suppressed.