Vision of some teriocos in the relation affection and development the emotions have essential paper for the psychic development of the human being, and are the great stimulant for the acquisition of the knowledge, that is, the emotional bonds that constitute the relations influence in the construction of the personality, of the auto one esteem, consequently providing the acquisition of the learning. Taking as base the theoreticians: Wallon, Vygotsky and Piaget, argued for Oliveira (1992), we intend to demonstrate that, affectivity and cognition must walk together, especially in classroom, the relation between educator and educating that they must interact mutually. In accordance with Davis (2008): Affection and cognition constitute non-separable aspects, gifts in any activity, even so in changeable ratios. The affectivity and intelligence if structuralize in the actions and for the actions of the individuals. The affection can thus be understood as the energy necessary so that the cognitiva structure pass to operate. more: it influences the speed with that if he constructs the knowledge, therefore when the people if feel insurances, they learn with more easiness (p.83). Harlan (2002), affirms that: Estressantes environments in classroom can increase the level of cortisol of the people, an element biochemist who inhibits the memory processes. A positive climate in classroom can increase the level of endorfinas element biochemist who induces the pleasant sensations, what he facilitates the memory (Apud SYLWESTER, 1994) (p.24). We can affirm that displayed pupils the situations of estresse, fear, anguish, anxiety, frustrations amongst other types of negative feelings, do not obtain to have a good development of learning, therefore in these occasions the brain liberates one substance called cortisol that it inhibits the neuronais ramifications, hindering that the pupil fixes the information that are being received for the brain. Contrary effect happens when the same it is displayed the situations pleasant, that comfort provides, confidence, joy amongst other positive feelings, at this moment the set free substance for the brain is the endorfina, that stimulates the neuronais ramifications, fixing for more time the acquired knowledge in classroom.