“Art is essentially form”, says Titus Burckhardt. This assertion concerns more particularly religious art which, to be called so, must have, according to the same author, not only a religious subject but also an adequate religious form. That is why, regarding religious art, there is an indefeasible relationship between form and meaning or form and subject. So, one can determine the religious character of a given kind of art by taking into account this relationship.In this article, we try to explain the place of form in religious art, then we envisage the crisis of the form in religious art in contemporary Iran.