PURPOSE: To execute the work outside the mouth while respectively placing the elbow of a hand taking a cutter and the elbow of a hand taking an object to be cut on elbow rest parts by providing the elbow rest parts at both the side parts of a back rest so as to put on the elbows of an operator and providing the other elbow rest part freely turnable around a seat part.

CONSTITUTION: This dental doctor chair is provided with a circular seat part 1, a first pillar 2 textended upward from the side of the seat part 1, a back rest 3 horizontally extended in almost circular-arcuate shape at the upper edge part of the first pillar 2, a second pillar 11 extended upward from the side of the seat part 1 at a height different from that of the first pillar 2 and turnable around the seat part 1 (in the direction of an arrow D) and elbow rest part 12 horizontally extended in almost circular-arcuate shape at the upper part of the second pillar 11. Both of side parts 3a and 3b of the back rest 3 are also used as the elbow rest parts, and both of elbows can be put on at th different heights by this side part 3a or 3b and the elbow rest part 12.