There is provided a toilet apparatus. The toilet apparatus includes a main part, a toilet seat, and a toilet lid. The main part includes a function part, and a case cover covering the function part. The toilet seat is attached rotatably to the case cover. The toilet lid is attached rotatably to the case cover. The toilet lid shifts between a closed state covering the toilet seat and an open state exposing the toilet seat. The toilet lid includes a lid main body covering upward the toilet seat in the closed state, and a hanging portion hanging from an outer edge of the lid main body, and covering a side of the toilet seat in the closed state. A lower end portion of an inside surface of the hanging portion changes to spread outside toward downward.