Abstract: An adaptor for attaching new, worn or broken blades to reciprocating saws. The adaptor has a slot wide enough to accommodate the working portion of the blade and includes a clamping member to clamp the blade in the slot. Since the blades are slightly flexible, the slot has a height slightly greater than the thickness of the blade, and the clamping member, such as a threaded member with a rounded end, will clamp and hold the blade by forcing it downwardly into a recess while forcing the edges of the blade upwardly into the upper shoulders of the slot. The adapter is provided with a tongue that allows the adapter to fit most, if not all, presently available saws.