The article highlights the psychological peculiarities of an individual’s self-actualization discussed in foreign and national psychology, consider the essence of self-actualization and disclosure of basic characteristics of a self-actualized personality. The representatives of the humanistic approach in psychology consider self-actualization as an integral personal quality and the most important mechanism of an individual’s development. In the process of self-actualization, an individual reaches the top of his/her capabilities. A.Maslow considered as the main characteristic of a personality his/her desire for self-actualization, self-expression and creativity. Self-actualization is defined as an individual’s desire to maximize his/her capabilities, to fully unlock his/her inherent natural potential. According to K. Rogers, the main driving force of an individual’s functioning is his/her tendency to self-actualization, that is, his/her need to realize his/her natural potentialities. People are able to define their lives, they are responsible for what they are; that is, freedom of self-determination is inherent in their nature. G. Allport viewed self-actualization as a path to becoming a mature personality. V. Frankl believed that the driving force of human behavior and personality development is searches for the meaning in life; an individual is free to find and realize his/her own meaning in life, because he/she is able to self-transcendence, that is, able to go beyond him/herself, rise above a situation and grasp a meaning in life. R. May emphasized that a creative personality values and preserves his/her inner freedom to fulfill his/her capabilities and live a true life. The main characteristics of a self-actualized personality include: spontaneity, naturalness, independence, creativity, passion for fulfilled work, etc. A self-actualized personality expresses a strong desire for development, creativity, love, happiness and fullness of life. In the work of national psychologists, self-actualization is examined in the context of self-realization and self-development and is defined as the desire for self-determination and improvement of oneself, implementation of personal capabilities, which contributes to the development of a holistic personality. S.L. Rubinshtein defined a personality as an agent of his/her own life; the basic characteristics of an agent is his/her ability to self-development, self-determination and self-improvement. According to B.G. Ananyev, a personality is formed in the process of an individual’s development and activities, which contributes to the manifestation of his/her unique individuality. The scientist regarded a self-realized personality as a mature personality. According to the views of M.Io.Boryshevsky, an individual is an active, conscious agent of all manifestations of his/her own life creativity and is able to create himself and at the same time cause positive changes in the surrounding reality. S.D.Maksimenko views self-realization as a natural and total-general characteristic of a personality. The need for self-realization is a source of an individual’s activities, and, at the same time, determines those activities that satisfy the need in the specific conditions of the individual’s life path. V.O. Molyako states that a creative personality chooses independently his/her actions and decisions, reaches significant levels of his/her mental development and professional skills, is responsible to himself and to the society. According to V.O. Tatenko, the main idea of an individual’s self-development is that the inner (an agent) acts through the external and, thus, changes him/herself and the external world. T.M. Titarenko views a personality as an open, not frozen, but constantly changing integrity, self-determined in the socio-cultural space and individual-psychological time. L.O. Korostyleva notes that, during self-realization, an individual reveals him/herself as unique, shows his/her abilities and reveals his/her inner potential. O.O. Bodalev understands an individual’s self-realization as constant self-development, the ability to plan and carry out actions that are in accordance with human values, to mobilize his/herself to overcome difficulties, to objectively evaluate his/her strengths and weaknesses. Both foreign and national scientists believe that self-actualization is an individual’s desire to continuously expand his/her unlimited creative potential in various spheres of life. Thus, self-actualization means implementation of an individual’s inner potential, which helps him/her to live a meaningful life.