PURPOSE:To change a pattern of liquid flow without varying a flow-out position by controlling the clearance between a nozzle cap bottom and a spinner to change the pattern of liquid flow. CONSTITUTION:When a nozzle cap 28 is revolved and screwed in, a push piece 48 pushes an annular seal piece 40 to the step part 41 of the nozzle cap according as the nozzle cap is screwed in. Accordingly, the communication between a flow path 46 and an orifice 30 is cut to set an off-position. According as the nozzle cap is screwed in, the annular seal piece 40 is put between the push piece 48 and the step part 41 to forcedly cut the communication between the flow path 46 and the orifice 30. As a result, even when the pressurized liquid running in the flow path desires to separate the ring seal piece 40 from the step part 41, it is not separated. Thereby, an unnecessary oscillation of a trigger when it is not used is limited and the liquid is sufficiently prevented from leaking.
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