Jesús Jara transmits to us a new concept of what a clown is in terms of its projection and transcendence beyond the limits of the performing arts, and makes it available to trainers, teachers, pedagogy students, instructors, entertainers, professionals of the theater and amateurs a tool that is, at the same time, fun and practical. In the first part, he carries out a brief historical study on the development of the clown in theater, cinema and the circus. In the second, he reveals to us various aspects of his clown philosophy and offers us guidelines on the use of the nose, gaze, voice, costumes and makeup, as well as instructions regarding the trainer and his work. In the third, he offers a large number of games and exercises that help to know and develop the clown that each person has inside. Alfredo Mantovani, specialist in theater in education, prefaces this manual of clown techniques, stating that going in search of our own clown will always induce us to explore ourselves and recover our inner child. Playing as a clown is representing ourselves as girls and boys do when they play theater.