The invention discloses a special examination chair used for a sonographer and capable of fixing a chair back and freely lifting the right arm. The examination chair comprises an examination chair body, armrests, a lifting assembly, the chair back and a massage assembly, wherein the armrests are symmetrically fixed to the outer wall of one side of the top end of the examination chair body in a plastic connection mode; the lifting assembly is fixed to the inner wall of one side of the corresponding armrest; the lifting assembly comprises a mounting groove, a motor, a two-way screw rod, a sliding block, a threaded hole, a lug block, a rotating shaft, a shear fork and a support; the mounting groove is formed in the top end of the corresponding armrest; and the motor is mounted on the inner wall of one side of the mounting groove in an embedded mode. By the adoption of a bracket device, the right hand of the sonographer can be lifted and supported, so that the arm of the sonographer is prevented from being suspended in the air in an examination process of a few hours, and the comfort degree in the examination process is improved; a supporting device can be machined to retract, so thatthe attractive effect is improved; and a massage device is further adopted, so that the sonographer can be massaged in idle time, and fatigue can be relieved.