The article presents identity-based training created on the basis of the social identity theory, categorization theory and common identity model. Training consists of three parts: (1) multiplicity and salience of identity; (2) identity as a course of conflicts; (3) ways for tolerance recategorisation, decategorisation, and mutual differentiation. Special set of games and exercises were created and three series of both traditional and identity-based trainings were conducted for leaders of ethnic communities and non-government organizations of Crimea. To estimate the effectiveness of trainings the method of semantic differential was used before and after trainings. Results show that identity-based training in comparison with traditional ones influence transformation of evaluation of conflict toward more changeable and resolvable and provide more knowledge and understanding of communal conflict's roots. (Contains 2 tables and 66 references.) (JDM)