Abstract: A scaffold end cap comprises a tapered tubular portion, a flange and a blocking member. The end cap is secured in a scaffold tube by an interference fit resulting from the compression of the end cap as it is pushed into the tube. The end cap prevents debris from entering the scaffold tube, since debris in a scaffold tube can be dangerous especially when scaffold is manipulated above ground level. In an alternative embodiment, the end cap is provided without a flange, in order that the end cap can be located entirely within a scaffold tube. Circumferential ribs are provided on the inner surface of the tubular portion, and longitudinal ribs are provided on the outer surface.