To provide a method for working an ejection nozzle, capable of working an ejection nozzle of a shape tapered toward the liquid ejection side homogeneously by laser beam irradiation from the orifice plate liquid ejection side so as to jump recording liquid droplets stably.

A mask plate with an ejection pattern 11 formed closely contacted on the liquid ejection side of an orifice plate 2. High energy ultraviolet ray laser parallel beams A, B, C, D are ejected simultaneously from the liquid ejection side in the direction inclined with respect to the vertical axis of the mask plate 1 at the same angle, and the closely contacted mask plate 1 and orifice plate 2 are subjected to at least one reciprocal scan in the laser irradiation area in the ejection nozzle arrangement direction. By such constitution the laser beam irradiation can be effected in the same condition for each ejection nozzle 21 with the integration effect provided for laser beam irradiation distribution irregularity so that all the ejection nozzles 21 can be worked in a uniform shape tapered toward the liquid ejection side.