A toilet apparatus includes: a toilet seat disposed above a toilet bowl; an image sensor photographing an inside of a bowl of the toilet bowl; and a control unit controlling the image sensor to execute an automatic photographing mode of automatically photographing the inside of the bowl. When acquiring a user's photographing intention information indicating whether or not the user has an intention to photograph the inside of the bowl, the control unit switches between executing and stopping of the automatic photographing mode based on the acquired photographing intention information.