A wooden building element for producing planar constructions, especially for constructing the upright walls of a building. Also, a corner building element adapted to the wooden building element and to a building constructed using the elements. The wooden building elements have two approximately rectangular support bases and two wall panels that are approximately equal in area. The support bases are maintained at a distance from each other by a plurality of supports that are aligned vertically in relation to the finished building and that delimit an interior compartment for the insertion of insulating material and building installations. The wall panels are fastened to the outer surfaces of the support bases and are set off therefrom in relation to longitudinal edges that are aligned approximately horizontally to the finished building and high edges that are aligned approximately vertically.