The paper is devoted to the historical fundamentals of entrepreneurship phenomenon emerging including the agricultural sector. Authors studied questions on establishing and development of agricultural business development. Primary functions of agricultural business such as resource, organizational, and creative were highlighted.Authors proved that successful entrepreneur management is not possible without readiness to innovations and changes on the agricultural market. Moreover, associated forms of agricultural business are revealed as socioeconomic fundamentals of prosperous private enterprises development. Authors stressed the agricultural business to be a result of vertical (agro-industrial) integration leading to the specific ownership framework transforming into forms of equity.Authors rely upon the fact that associate forms of entrepreneurship is caused by high risk and lack of entrepreneurs' financial resources, skills, experience, and adequate partnership.

S.V. Klimchuk Et Al (2017). Theoretical and Methodological Fundamentals of Associated Forms of Agricultural Business, European Research Studies Journal Volume XX Issue 3B, 130-137