The aim of the research is to assess development of entrepreneurship infrastructure of various countries according to opinions of experts from these countries. The elements were: knowledge and technology transfer infrastructure; commercial and professional infrastructure; production and information infrastructure; market infrastructure; institutions providing easy access to existing markets; social and cultural infrastructure. The research is based on methods of economic analysis, analogies, generalizations, classification, system, and structural approaches. Information from the Global entrepreneurship monitoring project report for 54 countries was used as input data. The estimation of the distribution of indicator values on the effectiveness of the six main infrastructure elements of business development reflecting the opinions of experts from these countries with the use of mathematic models of normal distribution. During the study we determined the average indicator values characterizing experts ' opinions on the effectiveness of each of the six key infrastructure elements of business development on a scale of ten; the intervals of their changes characteristic for the majority of countries were also considered. New knowledge about the effectiveness of infrastructure elements of business development in various countries has been obtained.