The concepts of ethnic identity and ethnicity are compared to each other; the main approaches of research on ethnicity are analysed. The restrictions of the primor- dialistic approach are discussed. The psychological analysis of the constructivist model of ethnicity as well as of its criteria is proposed in here. The analysis of the ethnological theories allows concluding that the unilateral vision of ethnic identity nature is illegiti- mate and ethnic identity should be studied as result of the cognitive-emotional process of self-determination of individual towards the ethnic groups in the social space — as result of belonging to the ethnic community experience.