PROBLEM TO BE SOLVED: To provide a device, program, and method for automatically selecting music in accordance with a situation in which a user is currently placed, without the active input operation of a user.SOLUTION: The present invention is a music reproduction device for automatically selecting music in accordance with the stress degree of a user on the basis of the pulse wave signal of a pulse sensor, the music reproduction device having: music vector storage means for arranging a large number of music in a multi-dimension vector space on the basis of different sensibility impressions, and storing the arranged music； sensitivity axis setting means for previously setting the sensitivity axis of oriented segment in the music vector storage means, and correlating a higher stress degree to the sensitivity axis in correspondence to the oriented segment of the sensitivity axis； stress degree measurement means for measuring a stress degree from fluctuation of pulse intervals with respect to the pulse wave signal of the pulse sensor； and music selection means for selecting, in accordance with the measured stress degree, music that is closest to the corresponding position on the sensitivity axis as the one to be reproduced.
