The present invention provides a behavior identification device that can identify various behaviors without specifically defining a component constituting a behavior in advance. The behavior identification device comprising:a sensor-value obtaining unit (10) that obtains the sensor value and calculates a sensor value distribution that is a distribution of the sensor value measured within a predetermined time；a component database (42) that stores therein a set of basic distributions that are basic components constituting the sensor value distribution；a ratio calculating unit (21) that calculates a first component ratio that is a ratio of each of the basic distributions included in the sensor value distribution；a component ratio database (43) that stores therein a second component ratio that is the ratio determined in association with a behavior to be identified； andan identification unit (22) that compares the first component ratio to the second component ratio to identify the behavior,wherein the basic distribution is calculated as a sensor value distribution that is a base when each sensor value distribution is assumed to be a vector based on a set of the sensor value distributions obtained in advance for each of a plurality of types of the behavior.
