Abstract: A device for hanging pictures and the like including a flat elongated ruler-like body adapted to be held in a generally horizontal position on a wall. The device has a centering means, such as a notch, at its midpoint and calibrated indicia extending outwardly longitudinally from the centering point. Conventional picture hooks are frictionally engaged at predetermined points along the upper edge of the device by a rod which is attached to the device parallel to and spaced apart form the upper edge. In using the device, a single mark is made on the wall to indicate the height and lateral position of the picture, and then the device is held with one hand in a horizontal position, with the centering notch registering with the mark on the wall, while the picture hooks are nailed into place with the other hand.