The second edition of the textbook (the previous one was published in 2001) has been revised and expanded. The book outlines theoretical and methodological issues in the study of human emotions and feelings. The main attention is paid to the analysis of the structure of the emotional sphere and its components: emotional tone, emotions, emotional properties of the individual, feelings, emotional types. The theories of the emergence of emotions, their functions and role in human life, changes in the emotional sphere in ontogenesis and in pathology are considered. The manual contains numerous methods for studying various components of the human emotional sphere, which can be successfully used for both scientific and practical purposes. The scientific content of almost all chapters of the second edition has been expanded taking into account domestic and foreign research published over the past 15 years. The textbook is intended for psychologists, psychophysiologists, teachers, as well as for undergraduate and graduate students of psychological and pedagogical faculties of universities.