Abstract: An improved, variable height, portable scaffold support that when used in pairs with a conventional board of standard size forms a horizontal working platform. The support has a series of opposing plates that allow insertion of a board at variable working heights. The opposing plates also provide a configuration that fixes the board and support in the correct working position so that the support does not need to be repositioned each time the support system is relocated, even when no auxiliary fasteners are used. The support base is of sufficient size to permit use of the support on a soft surface such as sand or grass.