A trigger type sprayer comprises a nozzle cover integrally formed with the nozzle and connected to the nozzle through an integral hinge. The nozzle cover includes a seal section for sealing the ejection hole of the nozzle. An engagement section is provided on the nozzle which snap-fits with a first lock section on the nozzle cover. A second lock section is provided in the nozzle cover which is snap-fittingly engageable with a hole in the upper surface of the sprayer body, whereby the nozzle cover is pivotable about the integral hinge and is lockable in either a nozzle-sealing position or a nozzle-opening position.