Abstract: A method for inspecting a display panel in which pixels each including a drive transistor that passes a drive current when signal voltage is applied to the gate of the drive transistor, and a light-emitting element that emits light according to the flow of the drive current are arranged in rows and columns, includes: applying, across the gate and the source of the drive transistor, an initialization voltage less than or equal to the threshold voltage of the drive transistor; applying a power supply voltage to the drain of the drive transistor to which the initialization voltage is applied across the gate and the source; and determining, as a defective pixel with a current leak, a pixel having a light-emitting element that does not emit light when the power supply voltage is applied to the drain of the drive transistor and emits light after the elapse of a predetermined period.