A far infrared physiatric unit has a frame, an emitter and two adjustment knobs. The frame has two side boards and a supporting unit. The supporting unit is mounted between the side boards. The emitter is pivotally mounted between the side boards in the frame. A patient places his/her arm or foot on the supporting unit, and the emitter is adjusted to any position and angle to correspond to any position on the patient. The patient can be in a comfortable position during the far infrared treatment.