The authors consider the process of self-fulfillment as an exteriorization of one’s inner world on a life scale. The research features the following ways of self-fulfillment: self-expression (positioning oneself), self-realization (the realization of one’s potential) and self-transcendence (commitment). The authors describe their constructive and non-constructive character, taking into consideration the "Oneself - the Other" axis, i.e. in the interest of one’s personality, as well as for the sake of other people. The efficiency of the self-fulfillment, the manifestation of the variants and the directivity were measured by means of the authors’ questionnaire. The authors conducted an empirical research of the self-assessment of self-fulfillment among teenagers and adults and its influence on the psychological well-being and emotional state. It was discovered that both the adults and the teenagers had a positive assessment of the self-fulfillment related with the expression of psychological well-being and general life satisfaction and was accompanied by the axis towards "the Other". The authors point out that life satisfaction, emotional and psychological well-being in teenagers was connected with a positive assessment of self-realization, while in the adults it was predetermined by all the ways of the self-fulfillment.