To provide a muscular relaxation monitoring device, a muscular relaxation monitoring method and a muscular relaxation monitoring program capable of accurately grasping a muscular relaxation state of a subject. An input/output unit obtains a first reaction, a second reaction, a third reaction and a fourth reaction which are the first to fourth stimulation reaction values of four consecutive stimulations of a muscle. A display unit displays a display screen. A control unit generates the display screen in which a display effect of the first reaction and the fourth reaction is different from a display effect of the second reaction and the third reaction.