To provide a dental treatment device in which a dental treatment chair and a spittoon device are separately arranged, the spittoon device has lifting function, and by which gargling adequacy is raised by properly locating a spittoon bowl corresponding to a patient on the dental treatment chair.

The dental treatment device A comprising the dental treatment chair 1 and the spittoon device 2 arranged in the side part of the dental treatment chair separately from the dental treatment chair is characterized in that the spittoon device 2 has a device base body 21, the spittoon bowl 22, and a displacing mechanism 4 for displacing the spittoon bowl 22 to the device base body 21, and the displacing mechanism 4 has the lifting mechanism 5 for vertically lifting and lowering the spittoon bowl 22.

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