Abstract: A lightweight construction element (1) comprises at least one lightweight panel (2) and a layer of insulating material (4) associated with the lightweight panel (2), wherein the at least one lightweight panel (2) comprises boards (6), which, on at least one of the main surfaces (8) thereof, have a group of grooves (9) running parallel and which boards (6) are arranged in at least one layer (5) and are connected to one another via adhesive bonds. The layer of insulating material (4) comprises wood chips (19), which are removed from starting boards during the manufacture of boards (6) for the lightweight panels (2). These lightweight construction elements have good load and thermal insulation properties. The material used originates from one source and achieves a large overall volume after processing.