Ludwig Binswanger (1881-1966) - one of the largest psychologists and psychiatrists of the XX century. His greatness is that he first laid the foundation of the therapy of mental illness by considering the patient's inherent way of being human in this world. Binswanger, based on the philosophical concepts of Heidegger and Husserl, created a phenomenological trend in modern psychotherapy, known as Dazainsanalysis. The book "Being-in-the-world" contains the main provisions of the method proposed by the author and his philosophical views and is of great interest not only for specialists: psychologists, psychotherapists, psychiatrists, philosophers, but also for a wide range of readers who want to find their place in the modern world. Translated into Russian for the first time.