Abstract: This invention relates to a construction module which is designed to interconnect with similarly constructed modules to form a structure, such as, a wall or a fence. The construction module is formed by a continuous sheet of extrudable material which is bent at different angles, so as to define a three-portion module. The first, open-end portion is formed by a pair of plates having converging extensions which define a passageway leading into the space between the plates. The second portion has a substantially reduced width suitable for fitting into the passageway of an abutting module. The third, closed end portion is smaller in width than the space between the plates allowing the third portion to fit into the space between the plates of the abutting module and receive upwardly extending tips of the converging extensions in corresponding grooves.