The publication publishes the main work of the founder of the Cambridge school A. Marshall "Fundamentals of Economics". Appeared in 1890, he completed the process of the marginalist revolution and heralded the beginning of the neoclassical trend in economics. It was repeatedly reprinted and for several decades was a desktop textbook on microeconomic theory in Western Europe, the USA and Japan. The previous Russian-language editions of 1983 and 1993, carried out by the Progress publishing house, have by no means exhausted the need for understanding what Marshall wrote, and for a number of reasons even increased reader interest.Analysis of the factors that determine the operation of the method « partial equilibrium”, demand, supply, production costs, occupies a central place in the book.Marshall proposed his version of the development of the theory of marginal utility, significantly improved the microeconomic apparatus, introducing the concept and formulas of elasticity, the principle “ceteris paribus ”, a technological criterion for considering the period of production in its three possible cases.The text of the Fundamentals is preceded by a classic preface by J. M. Keynes, A. Marshall’s successor in the Cambridge school.The publication is equipped with an index and a glossary of the main terms and concepts used by Marshall.