To enable a patient to easily spit out foul water, etc., toward an aperture of a spittoon and to rapidly perform a waste water disposal of the foul water, etc.

The dental treatment apparatus A is provided with an at least vertically movable dental chair 1 for patients and the spittoon 2 installed near the dental chair 1. The spittoon 2 has an upper opening 23 which is formed to an approximately spherical shape at its inside surface and is inclined toward a head 13 side of the dental chair 1 for patients.