Abstract: A lawn edger attachment for a tractor including a boom universally pivoted at its inner end to the tractor for both horizontal and vertical movement of its outer end, and normally angling acutely outwardly from the tractor, a circular cutting blade mounted beneath the outer end of the boom for rotation both about its own horizontal axis and about a vertical axis relative to the boom, a manually operable mechanism for pivoting the boom to position the blade above and in the plane of the division line between grassy and paved ground areas, and to lower it into ground engagement at the division line, the mechanism having a novel arrangement reducing the apparent weight of the boom and blade to the tractor operator, and a manual operating mechanism for pressing the blade into penetrating relation to the ground, the mechanism providing a great mechanical advantage in multiplying the manual force applicable by the operator of the tractor.