Abstract: The invention discloses a panel section interconnecting member adapted to be used in the construction of shelf structures or shelf-like furniture. It comprises a generally rectangular base plate member of essentially flat configuration, one surface thereof comprising four generally tetrahedrally shaped supporting members protruding therefrom. First side walls of the supporting members are arranged essentially parallel and with a certain distance to second side walls of an adjacent supporting member, defining therebetween receiving channels adapted to receive horizontal and vertical panel members of a shelf structure to be erected. The so-formed channels thereby have an essentially cross-like configuration and the base plate comprises a central opening provided in the center of said cross for receiving a mounting screw or the like mounting member to mount the interconnecting member to a wall.