To examine and treat both ears without making both treater and patient move, minimize inconvenience and troublesomeness given to the treater and the patient, shorten treatment time and minimize a space occupied in a treatment room.

The swivel chair for a patient has an operating switch box 40 mounted on one side of a chair rotating and driving section 36 and controlling the driving of a sucker 52, a microscope 48 and a monitor 50, a first linking mechanism 42a linking tool shelves 46 with the sucker 52 mounted and the backrest 32 and horizontally adjusting the position of the sucker 52, and a second linking mechanism 42b linking the microscope 48 and the backrest 32 and fine-adjusting vertically and crosswise the microscope 48, and a third linking mechanism 42c linking the monitor 50 and armrests 35 and adjusting the monitor 50 rightwards and leftwards.