Abstract: An installation for the manufacture of prefabricated elements of ordinary or reinforced concrete comprises one or more mobile molding pallets, each including a pouring table, a plurality of molding cheeks continuously coupled to said table and mounted individually with respect to said table so as to move between a closure position adapted to form a cavity for molding said concrete elements and an open position in which said elements can be de-molded, means being mounted on said table and associated with each said cheek for actuating the opening and closure of said cheeks and for locking said cheeks in the closed position. The installation described has a plurality of work stations between the pouring and final de-molding stages, arranged in two lines with a transfer station between lines.