Provided is an auditory sensitivity regulating device suitable for increasing the ability to concentrate and the ability to focus attention, in any direction. This auditory sensitivity regulating device (100) is provided with: grab parts (32a, 32b) for gripping the auditory capsule (50)； a spring (22) for imparting to the grab parts (32a, 32b) pulling force in a direction that extends the auditory capsule (50) gripped by the grab parts (32a, 32b)； and a base (38) that rotates in such a way as to twist the auditory capsule (50) gripped by the grab parts (32a, 32b).
