The book brought to the attention of the reader is dedicated to one of the most famous and effective hand-to-hand combat systems, Hapkido. Originating in the middle of the 20th century, Hapkido quickly formed into a complete system and is currently extremely popular not only in Korea, but also abroad. The book details the history, fundamental principles of Hapkido, basic techniques, theoretical and applied aspects of hand-to-hand combat. The main attention is paid to the consideration of the formal technique of Hapkido and the analysis of the techniques used in hand-to-hand combat. This work contains a large number of illustrations, which makes it more visual and easy to understand.