To provide the microengine device for a dental technique of a desk top type suitable for use by being placed on a desk.

On the upper surface of a control box 10, a power source switch 11, the normal/reverse rotation changeover switch 12 of a microengine hand piece 20 and a rotation speed adjustment knob 13, etc., are provided. The control box 10 is placed on the desk, the power source switch 11 is turned ON, the normal rotation or reverse rotation of a microengine is selected by the normal/ reverse rotation changeover switch 12, the rotation speed of the microengine is adjusted to a desired rotation speed by a volume adjustment knob 13 and then, an artificial tooth is worked by turning a foot controller 30 ON and OFF. The operation of the switches or the like is facilitated by inclining the upper surface of the control box 10 forward, a recessed part 10A is provided on the tip part of the upper surface and the hand piece 20 is placed at the recessed part 10A.