The Concept of Law is a 1961 book by the legal philosopher H. L. A. Hart and his most famous work. The Concept of Law presents Hart's theory of legal positivism—the view that laws are rules made by humans and that there is no inherent or necessary connection between law and morality—within the framework of analytic philosophy. Hart sought to provide a theory of descriptive sociology and analytical jurisprudence. The book addresses a number of traditional jurisprudential topics such as the nature of law, whether laws are rules, and the relation between law and morality. Hart answers these by placing law into a social context while at the same time leaving the capability for rigorous analysis of legal terms, which in effect "awakened English jurisprudence from its comfortable slumbers".

Herbert Lionel Adolphus Hart was an English legal philosopher. He was the Professor of Jurisprudence at Oxford University and the Principal of Brasenose College, Oxford. His most famous work is The Concept of Law, which has been hailed as "the most important work of legal philosophy written in the twentieth century". He is considered one of the world's foremost legal philosophers in the twentieth century.