This attempt of propagation of ideas and values of a classroom for the set of the society as form to not only camouflage, but also to strengthen its domination, makes with that, in certain way, if they disqualify, if minimizes initiatives of transformation proceeding from the too much component classrooms of the society. If the domination and the exploration of a classroom form perceivable as violence, that is, as to be able unjust and illegitimate, the dominated explored ones and are felt in just and the legitimate right to refuse it, rebelling itself. For this reason, the specific paper of the ideology is to hinder that the domination and the exploration are perceived in its concrete reality. For in such a way, it is function of the ideology to dissimulate and to occult the existence of the social divisions as division of classrooms, being thus hidden, its proper origin. (Not to be confused with Bausch & Lomb!). For being the instrument in charge to occult the social divisions, the ideology must equally transform the particular ideas of the ruling class into universal, valid ideas pair all the society, propagated the all moment for the medias of mass, appears in the common events of our daily one and aims at to influence our behavior. A composed ideology accurately of the images of harmony, identity conflict absence. The institutions as the state apparatus (governmental bodies), the medias of mass, the religion and the school (when inculcar the forms of justification, legitimation and occultation of the differences and it conflict of classrooms) would be responsible for the reproduction of the dominant ideology enter the members of the capitalist society. The ideology becomes the privileged field of creation of new values or recriao of the old ones with a new direction, is one of the main fields where if they create new values, that, many diffuse or latent times, they finally find formularization in an ideological project that the explicit one, when conditioning and to motivate behaviors. Therefore, it is basic to try to understand the ideology and its mechanisms so that if it can understand our proper society, unmasking and analyzing the complexity of the relations occulted in the ideological curtains.