Abstract: A water jet cleaning device for a includes a base and a cover secured to a toilet. A tube is secured in the base has a lower end coupled to a water tank. A pipe is secured on the tube and has an upper end extended outward the cover and has an outlet coupled to a sprayer head and has a valve seat. A rod is received in the pipe and has a plug for engaging with the valve seat of the pipe and a spring may bias the plug to engage with the valve seat. A water jet may flow out of the sprayer head via the pipe when the plug is forced away from the valve seat against the spring.