To enable medical treatment operation only by connecting a power supply terminal to a commercial power source by integrally fitting a compressor and a vacuum system to the main body of a unit and providing an instruments for dental treatment, air/liquid separation tank and commercial power supply terminal.

At a main body 10 of dental treatment unit for sick visit, instrument 1 for tooth cutting, syringe 2 and vacuum tube 3, etc., are freely attachably and detachably housed and small article pockets 41, 42 and 43... are integrally provided. Besides, an air/liquid separation tank 5 has a vacuum sucking device inside, dirty liquid sucked from the vacuum tube 3 or a saliva drainage tube is separated into liquid and air to the air/liquid separation tank 5, the separated dirty liquid is stored to be removed and stored dirty liquid is suitably discharged. Then, the commercial power supply terminal is provided and a water supply tank 6 is pressurized by an internal compressor and used for the spray for microengine or syringe. In this case, the water supply tank 6 is detached and water is put in it at the time of use.