The present invention provides a light emitting device drive circuit which does not require complicated feedback control for shortening a rising response delay time in the transition from an extinction state of a light emitting device to a light emitting state so as not to increase a bias current, and for eliminating harmful effects due to the influence of a droop phenomenon. A circuit including a series of a coil (55) and a resistor (54) is connected in parallel with an LD (53). In this configuration, the LD (53) is subjected to supply of an overshoot drive current ILD for a time period determined by a time constant of the coil (55) and the resistor (54), i.e., a time period in which a high-frequency current is supplied in the transition from the extinction state to the light emitting state. Thus, a delay in rise time until light emission of the LD (53) can be decreased. The drive current ILD supplied to the LD (53) is increased in proportion to a decrease of a forward voltage V op supplied to the LD (53) due to temperature rise. Thus, even if the light emitting state continues for a long period of time, the intensity of light emission from the LD (53) can be kept constant.