Device for connecting two prefabricated construction elements together

A construction system comprising at least two prefabricated construction elements each having a panel, the panels abutting each other along vertical faces, wherein each prefabricated element includes permanent formwork comprising two parallel plates at a distance from each other, each of the plates being in a solidified hydraulic mixture and including a built-in metal reinforcement, an insulating block separating the two plates, and transverse spacers interconnecting them, said construction system having prepositioning and connecting means to allow connection of two consecutive elements, formed by a male metal connector secured to the metal reinforcement of a first element, and by a female metal connector secured to the metal reinforcement of a second consecutive element, wherein the male connector includes a hook protruding in the direction of the female connector and the female connector forms a housing defined by first and second side walls perpendicularly stemming from a vertical face of a corner angle portion, delimiting a bottom corresponding transverse reservation, at an end of said second element, said first and second side walls being closed at their free ends by a third front wall perpendicularly stemming from a horizontal face of said corner angle, the hook cooperating with said third front wall to assemble the elements, the side walls of the housing of the female connector extending through fins extending away freely from each other to form a V, so as to allow guidance and facilitate the introduction of the hook in said housing.