Abstract: A building element for masonry walls, particularly load-carrying walls in the foundation walls of dwellings and industrial premises and in outer walls, such as in outbuilding, the element comprises a core of insulating materials, surrounded by side members that are respectively the inner and outer side of the finished wall. Massive end members are cast in connection with the side members. Side members are made completely with concrete or of other strong materials which can easily withstand vertical and lateral loads. The end members are made of lightweight concrete or similar materials. The end members are located to connect the inner and outer walls and at the same time provide good insulation characteristics.