Today free access to the free information is one of doubtful principles of democracy that leads to form the concept of citizen ship and it has been clarified in international documents.

In Islam's jurisprudence and in Iran laws with the ratifying of the law of publication and free access of information, this right has been accepted. According to the mentioned law, public and private Institutes are obliged to provide necessary information for the citizens except in several cases And inform them. Accordingly, the main question in the article is what are the principles governing the dissemination and free access to information in Islam and the subject law? Which has been analyzed by descriptive-analytical method and referring to library sources, and based on this, some principles have been obtained : freedom of expression, consultation, supervision right, information right, information trusteeship, prohibition of science reservation and clearness.

prohibition of science reservation and clearness.