A washing water spraying vessel for a nasal cavity cleaner, comprising: a container body for receiving contents; an inner cap having a cylindrical shape and coupled to the container body while covering an upper portion of the container body, for installing an elastic body on an inner side of the inner cap; a nozzle ascending or descending relative to an upper portion of the inner cap while being supported by the elastic body; an outer cap coupled to the inner cap while covering the inner cap, comprising a pair of buttons for moving axially inwards by a user pressure at both sides of an upper portion of the outer cap to descend the nozzle by pressure of the buttons; a pumping member for discharging the contents outwards through a pumping operation by the ascending or descending of the nozzle; a coupling part coupled to an upper portion of the outer cap and fix an overcap which detachably coupled to the coupling part while covering the nozzle, wherein on both sides of an outer circumference surface of the upper portion of the inner cap, an up-and-down guide protrusion for guiding ascending or descending the outer cap is formed; wherein the nozzle is supported by the elastic body, and on a lower end of the nozzle, a guide groove is formed to move along the up-and-down guide protrusion, and on an upper end of the nozzle, there are a body for forming a pair of pumping guide protrusions having a slope in both directions so that a width gets narrower from the lower portion toward the upper portion, and a coupling pipe protruded upwardly between the pair of pumping guide protrusions and coupled to the pumping member, thereby pressing the pumping member; wherein a pressing protrusion for pressing the pumping guide protrusion is formed on an inner side of the button, and characterized in that a section is formed on both sides of an outer circumference surface of the nozzle to rotate together according to a rotation of the overcap by interlocking with the overcap, and an inner circumference surface of the overcap has a shape corresponding to the section; wherein, when the nozzle and the overcap rotate together, a location of the guide groove of the nozzle is changed depending on the rotation of the overcap, from which it is possible to control an ascent or a descent of the nozzle according to the location of the guide groove. a container body for receiving contents; an inner cap having a cylindrical shape and coupled to the container body while covering an upper portion of the container body, for installing an elastic body on an inner side of the inner cap; a nozzle ascending or descending relative to an upper portion of the inner cap while being supported by the elastic body; an outer cap coupled to the inner cap while covering the inner cap, comprising a pair of buttons for moving axially inwards by a user pressure at both sides of an upper portion of the outer cap to descend the nozzle by pressure of the buttons; a pumping member for discharging the contents outwards through a pumping operation by the ascending or descending of the nozzle; a coupling part coupled to an upper portion of the outer cap and fix an overcap which detachably coupled to the coupling part while covering the nozzle, wherein on both sides of an outer circumference surface of the upper portion of the inner cap, an up-and-down guide protrusion for guiding ascending or descending the outer cap is formed; wherein the nozzle is supported by the elastic body, and on a lower end of the nozzle, a guide groove is formed to move along the up-and-down guide protrusion, and on an upper end of the nozzle, there are a body for forming a pair of pumping guide protrusions having a slope in both directions so that a width gets narrower from the lower portion toward the upper portion, and a coupling pipe protruded upwardly between the pair of pumping guide protrusions and coupled to the pumping member, thereby pressing the pumping member; wherein a pressing protrusion for pressing the pumping guide protrusion is formed on an inner side of the button, and characterized in that a section is formed on both sides of an outer circumference surface of the nozzle to rotate together according to a rotation of the overcap by interlocking with the overcap, and an inner circumference surface of the overcap has a shape corresponding to the section; wherein, when the nozzle and the overcap rotate together, a location of the guide groove of the nozzle is changed depending on the rotation of the overcap, from which it is possible to control an ascent or a descent of the nozzle according to the location of the guide groove.