Abstract: An adjustable device for leveling a ladder having one or more bores through at least one of the stiles thereof, comprising an elongated channel shaped ladder extending member independently cooperatively engagable with one of the stiles of a ladder and being slidable thereon, the channel shaped member having two opposite side walls and a connecting wall extending therebetween, a plurality of spaced longitudinally disposed apertures in each opposite side wall, the apertures in one side wall corresponding to and being in lateral alignment with the respective apertures in the other side wall to define aperture pairs, each aperture pair being able to be positioned in alignment with a selected one of the bores through the ladder stile when the channel shaped member is engaged therewith, a pin member adapted to pass through the selected ladder stile bore and the aperture pair in alignment therewith to hold the leveling device in the desired position with respect to the selected ladder stile, and means attached to th