An emotion recognition device includes: a memory that stores a set of instructions； and at least one processor configured to execute the set of instructions to: classifies, based on a second emotion, a biological information pattern variation amount indicating a difference between first biological information and second biological information, the first biological information being measured by sensor from a test subject in a state in which a stimulus for inducing a first emotion is applied, the second biological information being measured in a state in which a stimulus for inducing the second emotion； and learn a relation between the biological information pattern variation amount and each of a plurality of emotions as the second emotion in a case where the biological information pattern variation amount is obtained, based on a result of classification of the biological information pattern variation amount.
