Existencialismo can be considered a vacant assignment of some philosophical theories, however, in a general way, can definiz it as a philosophical doctrine that emphasizes subjects as the individual, choices and the nonsense of the life human being when acquiring a rational understanding of the universe. The phrase that loads the essence of the existencialismo of Sartre that can be known as its motto is: The existence precedes the essence. The existencialistas defend this affirmation refererindo itself it the fact with that, to its to see, the human being is not endowed with a predetermined model of its essence, and the essence of each man must be pursued in elapsing of its existence. Thus, the man exists first, if he discovers, he appears, and only later if he defines as to be endowed with conscience. According to Sartre (1987), ' ' The man nothing more is of what what it makes of itself mesmo' '. Sartre, born in Paris, was the first philosopher if to identify as existencialista, at a conturbada time ' ' after-guerra' ' counted on the support of its friend Simone de Beauvoir, stimulated that it to write its first romance (Nausea). Nausea is a romance, and in such a way many of the writings of Sartre had been in this literary style, however they had enclosed also written for theater and writings of philosophical nature. The workmanships of Sartre had been important influence for the society of the time, still shaken for World War II. In a vacant attempt of definition, visa the difficulty in reaching all the aspects of this concept in Sartre, the freedom can be characterized as the choice that the man makes of its proper one to be and of the world. But for if dealing with a choice, to the step where it is made, generally it indicates others many how much possible choices.