Disclosed is an improved sanitary toilet bowl capable of protecting a human body against bacteria and giving a comfortable environment to a toilet by sucking and removing bad smell and bacteria. The sanitary toilet bowl includes a valve unit mounted to open or close a top of the overflow tube according to a water level in the water tank, an air suction tube installed to communicate with the overflow tube through the valve unit, a circulating pump installed in water of the water tank and having a circulating water suction tube and a circulating water discharge tube respectively provided at both ends thereof to suck the water stored in the water tank and discharge the sucked water for circulation, and a Venturi tube installed on the circulating water suction tube or the circulating water discharge tube and connected to the air suction tube perpendicularly to generate an Venturi effect.