Abstract: An apparatus for self-adjusting the height of an outrigger attachable to scaffolding comprising a support having a back wall and side walls with a plurality of apertures located along the length of the back wall, the exterior of the back wall having clamps for removable coupling with tubular scaffolding. The apparatus further includes a vertically disposed angle iron positioned parallel with the support on the side there opposite from the clamps and having coupled thereto at its upper and lower ends a wheel carriage for riding within the support. The apparatus further includes an outrigger platform extending forwardly from the angle iron and secured thereto for supporting an operator standing on the platform. The apparatus further includes motion imparting means to move the platform with respect to the support.