The invention provides a discharge lamp lighting apparatus, wherein a simple and effective circuit stucture is able to check the lighten state of a discharge tube, characterized in that, having: a converting circuit including a switch element and a transformer, and for stimulating a discharge lamp, a converting control circuit for controlling the switch element under high frequency, a controlling power supply circuit of the converting control circuit, which be generated by a coil arranged at the secondary side of the transformer, a jugdement part for checking the lighten state of the discharge tube using the voltage value of the power supply produced by the controlling power supply circuit. |