Abstract: A wall block element (1, 2, 3) for building and/or landscaping purposes, such as for building a retaining wall (4), masonry wall (5) and/or a curb. The wall block element (1, 2, 3) comprises a first panel (6) and a second panel (7), at least said first panel (6) being a natural stone slab. At least two spacer elements (8, 9) made of steel are arranged at a distance from each other for placing and adjoining the first panel (6) and the second panel (7) together in parallel and at a distance in relation to each other. An inner space (10) is defined by the panels in-between the panels in which inner space a filling material (11), such as cast concrete, can be placed, said spacer elements each having connecting means (12) to attach at least the first panel to the spacer elements.