Corporate agreement as law construction is new for Russian legislation. Law nature of corporate agreements and their place in the legislation system are discussed. Certain provisions of these documents contradict effective Laws on joint-stock companies and on limited-liability companiesmaking practical use of these documents vague. Joint-stock agreements overwhelm in the corporate agreements. Corporate agreement norms are to be adapted to Russia laws by changing the imperative character of the latter to the alternative one. The law analogy approach should beapplied to corporate agreements