Provided is a respiratory abnormality improvement apparatus capable of effectively improving respiratory abnormality during sleep. The present invention is a respiratory abnormality improvement apparatus for applying a stimulus signal generated in a stimulus generating unit to a patient as an electric stimulus. Here, the apparatus includes a respiration detection unit for detecting a respiratory condition of the patient. Particularly, the stimulus generating unit is so configured that a first stimulus signal generated at a current level preset at a given time, and a second stimulus signal of a current level different from that of the first stimulus signal are generated as stimulus signals to an electrode member worn by the patient based on a detection signal from the respiration detection unit when the patient has been judged to be under a respiratory abnormality condition.
