We offer this book to those who want to know the main theories of Psychoanalysis through an easy and didactic reading. To this end, the text was divided into three parts that portray the nuances that involve the life, the clinic and the construction of the psychoanalytic theory established by Sigmund Freud in the late nineteenth and early twentieth centuries. However, before pretending to satisfy the reader with ready-made formulas, this writing, in fact, intends to encourage him to seek to read and get to know the rich Freudian work and, starting from it, navigate the dense, curious and deep sea of the waters of psychoanalysis that over time, and not by chance, has gained other disciples, scholars, theorists and analysts around the world.