A power tool holding article is provided and fastened to a power output element by clamping. The power output element has a fastening portion which has at least one protrusive fastening element to hold the holding article. The holding article has an article body and a mating portion connecting to the article body. The mating portion has a plurality of bulged elements spaced from each other to form a plurality of holding spaces. The protrusive fastening element of the fastening portion is engaged with the holding spaces to hold the holding article. Thus no special-shaped drilling openings are needed on the holding article. It can mate power output elements made by varying producers to reduce cost and improve compatibility.