Аннотация:This article presents the ordinary meanings of the idea of the constitution's force of law in the national doctrine and jurisprudence, and examines the arguable aspects of the invocation of this principle, its origins and its real meaning in the constitutional law scope, as well as the deviation from the institutional praxis from a true constitution's force of law in several cases.It finishes with a critical revision of the effect of invoking the constitution's force of law principle on the system of sources.