PURPOSE: To perform work while putting both elbows on an elbow receiving part by providing a dental doctor chair with an elbow receiving part to put the elbow of a client at the back and other elbow receiving part rotatably around the seat.

CONSTITUTION: The chair is provided with a circular seat 1, a 1st prop 2 extending upwards from the side of the seat 1, a back rest 3 circularly extending in the horizontal direction at the upper end of the 1st prop 2, and a 2nd prop 11 extending upwards from the side of the seat 1 and being rotatable around the seat 1. At the upper part of the 2nd prop 11, a rotatable elbow receiving part 12 is formed in the horizontal direction. The right part 3R of the back rest 3 serves as an elbow receiver. With the elbow receiver 3R and the elbow receiving part 12, the height of both elbows are made to be all the same length or different.