A trigger type liquid sprayer (1) is provided with a sprayer main body (2) having a vertical supply pipe unit (10), a spray pipe unit (11), and a trigger mechanism (50). The trigger mechanism is provided with a main piston (52) that moves along with a trigger unit (51), and a main cylinder (53) for accommodating the main piston. The sprayer main body is provided with: a retention cylinder (90) to the inside of which a liquid is supplied through the vertical supply pipe; a retention plunger (110) that moves along with the supply of the liquid to the inside of the retention cylinder; a first check valve (36) for blocking linking of a vessel body (A) and the vertical supply pipe unit when pressure is applied within the main cylinder and allowing the linking when pressure is reduced; and a second check valve (102) for allowing linking of a spray hole and the vertical supply pipe unit when pressure is applied within the main cylinder and blocking the linking when pressure is reduced. The trigger type liquid spraye
