Abstract. The purpose of the study is to develop an organizational and economic mechanism for motivating the increase of investment activity of the enterprise and substantiation of environmental incentives that affect the motivation to increase the investment activity of enterprises. The following general scientific and applied research methods were used in the research process: analysis and synthesis, deduction and induction were used in the process of determining environmental incentives that affect the motivation to increase investment activity of enterprises; systematization and generalization in the process of clarifying the essence of the organizational and economic mechanism of motivation to increase investment activity of enterprises; method of abstraction and formalization — to substantiate the conceptual provisions of the organizational and economic mechanism of motivation to increase investment activity of the enterprise; monographic methods — for in-depth study of the tasks; abstract-logical methods — for theoretical generalization of research results and formulation of conclusions and proposals. The article considers the essence and structure of the organizational and economic mechanism of motivation of investment activity of the enterprise. The proposed organizational and economic mechanism of motivation of investment activity of enterprises allows investors to minimize expenses on investment activity, reduce risks when concluding an investment agreement, and more accurately carry out an estimation of future revenues from the project implementation. The practical significance of the research is, above all, in the construction of the scheme of the organizational and economic mechanism for motivating the investment activity of enterprises in the existing economic conditions, which creates the prerequisites for a more fundamental understanding of the process of investing and conducting a more responsible and sound investment policy. The originality consists in substantiating the structural elements of the organizational and economic mechanism of motivation of investment activity of enterprises influencing and determining the directions of stimulation of the motivation of investment activity of enterprises, allows combining the study of active business processes, financial support and creation of information support. Keywords: motivation, incentive, levers, methods, investment activity, mechanism, organizational and economic mechanism. JEL Classification G31, G11, R11, E22, O14 Formulas: 0; fig.: 2; tabl.: 0; bibl.: 23