To enhance the operability of a medical or dental treatment station.
In a medical or dental treatment station 1, the treatment station 1 is provided with a treating chair 2 and one handpiece or more 15. The handpiece 15 can be set in a holder 14 when it is not used. The one handpiece or more 15 are constituted of suction hand pieces 15a and 15b linked to a sucking device 18 by flexible suction tubes 17a and 17b. A switch 27 is provided to turn OFF or ON the operation of the sucking device 18 and is ranged at the position of the treating chair 2 and/or a position accessible from working position of a physician and/or assistant in an area of legs or feed of the physician and/or the assistant.