An extreme ultraviolet light generation apparatus may include a chamber containing a plasma generation region irradiated by a pulse laser beam from a laser apparatus, a target supply device configured to supply a plurality of targets consecutively to the plasma generation region in the chamber, a target detection unit configured to detect a target outputted from the target supply device, and a laser controller configured to control the laser apparatus; the laser controller generating a light emission trigger instructing a laser device included in the laser apparatus to emit a pulse laser beam, and outputting the generated light emission trigger to the laser apparatus, in accordance with a detection signal from the target detection unit; and the laser controller adjusting generation of the light emission trigger outputted consecutively to the laser apparatus so that a time interval of the light emission trigger is within a predetermined range.