To provide a high-pressure discharge lamp device, capable of appropriately inhibiting the generation of starting pulses of high voltage and power supply with a simple structure, not only at the opening an operation opening part, but also even under various conditions such as incorrect connection, or the like, at a high-voltage contact point.

The high-pressure discharge lamp device 1 includes an interlock mechanism 34 for blocking a power source supply route 30 to an HID 11, when a lid 8 is not insertion-coupled to an opening part for operation 7 opening toward a case 2 at a proper insertion-coupling position; a connector 36, having a fixed side connector part 36a fixed to the case 2 and a movable side connector part 36b in free insertion into the fixed side connector part 36a and interposing on the power source supply route 30; and an interference member interfering insertion of the lid 8 into the opening part for operation 7 through displacement by the movable side connector part 36b, when the movable side connector part 36b is to be placed farther toward a separating side than to the proper insertion-coupling position on an insertion-removal route with the fixed side connector part 36a.