An animal emotion estimation device includes: a sound collector configured by an elastic member having a recess, a sound concentrating microphone provided on the bottom portion of the recess, and an impact absorber covering the entire of the elastic member and the sound concentrating microphone; a harness to mount the sound collector on an animal; a converter that filters and converts the sound collected through the sound collector into a heart rate signal; an estimation portion that estimates the emotion of the animal based on the heart rate signal; and an output unit that supplies information showing the estimation estimated by the estimation portion.
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