Abstract: An automatic cleaning assembly for a toilet bowl includes a body member having an interior cavity therein for receiving a cleaning agent. An inlet is in communication with an interior of the body member and is connectable to a ball cock through a refill tube and an outlet is in communication with an interior of the body member and is connectable to an overflow pipe through a connecting hose. Furthermore, a cap is attached to the body member. The cap is free from apertures therethrough and sealed to said body member to form a sealed space at an upper portion of an interior of the body member. The sealed space ensures that a level of water within said interior cavity of said body member remains at a bottom of the cleaning agent to slowly dissolve the cleaning agent. With the above construction, an improved cleaning assembly for a toilet bowl is provided, which is simple in structure, inexpensive to manufacture, and can clean the toilet bowl thoroughly.