To be able to prevent the adhesion of dirt to the top surface of a gate valve member and the residual excreta by devising the opening of the gate valve member and the flow-in timing of wash water.

A toilet apparatus includes: a water supply tank 4 for supplying the wash water for washing a toilet bowl; a toilet bowl body 1, capable of being supplied with the wash water from a water supply tank 4, for receiving dirty excreta; a crushing device 2, provided under the toilet bowl body 1, for crushing excreta as well as the wash water for washing the toilet bowl; a gate valve mechanism part 2a disposed openably and closably between the toilet bowl body 1 and the crushing device 2; a gate valve motor 2c for opening or closing the gate valve mechanism part 2a; and a control unit 8 for controlling the water supply tank 4 so as to start supplying the wash water for washing the toilet bowl to the toilet bowl body 1 as well as controlling the gate valve motor 2c so as to start the opening of the gate valve mechanism part 2a.