Abstract: A portable, lightweight, reciprocating saw for topping trees and the like has a frame with a clamp for attaching the frame to a tree. The frame has a pair of interconnected sprockets, one attached through a shaft to a detachable, portable power drill, and the other attached at its periphery to a curved blade. As the second sprocket is rotated, the saw blade reciprocates. The reciprocating saw blade is held against a tree top or branch by means of a biased blade guide adapted to move along a guide rail disposed perpendicularly of the frame in one plane and of the tree in the other plane for essentially automated, non-manual operation of the saw.