PROBLEM TO BE SOLVED: To provide a chemical agent spray device which can spread a chemical agent into a carpet so that the chemical agent works effectively in the carpet for a long period of time when the chemical agent, such as a water repellent and an antibacterial agent, are sprayed to the carpet laid on a floor without detaching the carpet laid on the floor from the floor.SOLUTION: The device for spraying the chemical agent to the carpet C includes a device body 11 that has a chemical tank 14 for storing the chemical agent, and a chemical agent spray part mounted on the device body 11, wherein the agent spray part has a spray nozzle 15 that sprays the chemical agent from the chemical tank 14 to the carpet, and a pressure part 18 that presses a tip of the spray nozzle 15 to dig into the carpet C.
