PROBLEM TO BE SOLVED: To provide an index output device for appropriately grasping a condition of a patient undergoing anesthesia.SOLUTION: An index output device 100 includes an electric stimulation part, an acquisition part 180, a calculation part, and an output part. The electric stimulation part gives electric stimulation to a living body. The acquisition part acquires reactions of a plurality of living bodies by the common electric stimulation given by the electric stimulation part. The calculation part calculates an index related to an extent of muscular relaxation and analgesic from the reactions of the plurality of living bodies acquired by the acquisition part. The output part outputs various kinds of indexes calculated by the calculation part.SELECTED DRAWING: Figure 1