disclosed is an economical washer device of a headlamp for a vehicle includes a nozzle unit integrally mounted onto a nozzle cover , the nozzle unit including a washer discharging opening and a washer introducing opening , wherein a washer liquid is fed through the washer introducing opening and selectively discharged through the discharging opening , and a slide drive unit integrated with the nozzle unit and configured and dimensioned to rotatably support the nozzle unit when the nozzle unit is rotated by an ejection pressure of the washer liquid discharged .