Provided is a device (1) for diluting and sprinkling a liquid agent, the device being capable of stably diluting the liquid agent and being easy to handle during sprinkling. A device (1) for diluting and sprinkling a liquid agent, the device being characterized: in being provided with a main diluting device unit (2), which has a solvent inflow port (6) through which the solvent flows in, a solvent outflow port (7) from which solvent taken in from the solvent inflow port (6) flows out, a liquid agent introduction port (22) for introducing the liquid agent from a liquid agent container (3), and a liquid agent-diluting section (12) that is formed between the solvent inflow port (6) and the solvent outflow port (7) and merges solvent flowing in from the solvent inflow port (6) with liquid agent introduced from the liquid agent introduction port (22) and in being provided with a sprinkling nozzle (5), which has a connection port (9) that is connected to the solvent outflow port (14) of the main diluting device unit (2) via a hose (4), a sprinkling port (10) that discharges solvent flowing in from the connection port (9), and a nozzle water stop valve (11) that switches between water conduction to the sprinkling port (10) and water cutoff.
