To provide a discharge lamp lighting device which allows to wind a primary and a secondary winding continuously by one and the same winding process and thereby increases the productivity and reduces a cost, and which has a low bulb voltage and a large current at steady lighting.

In the discharge lamp lighting device equipped with a high-voltage generation transformer 1, the primary winding 5a or 6a and the secondary winding 5b or 6b of the high-voltage generation transformer 1 are formed of one and the same wire material 5 or 6. The primary winding 5a or 6a is wound close to the secondary winding 5b or 6b outside the secondary winding 5b or 6b to constitute the high-voltage generation transformer 1.