The textbook is intended for conducting classes in the new discipline "Behavioral Finance," which is beginning to be actively taught in Russian and foreign universities. The basics of the origin of behavioral finance, differences from traditional finance are described in detail and carefully, the toolkit of behavioral finance is described and shown how it is applied in practice in the work of a financier in budgeting, accounting, valuation and trading. The tutorial has a case-oriented focus. The material of the publication is closely integrated with social networks. The manual is used interactively. For undergraduates and bachelors studying in the areas of training "Economics," "Finance and Credit," students of abbreviated programs, professional retraining programs, financiers.