Abstract: My invention relates to an attachment that may be connected as a unit to the bed of a conventional jointer to easily convert the same for planing operations. The attachment comprises support members which are adapted to be secured to the stationary bed of the jointer, threaded posts rigidly carried by the support members, sprockets threaded on the posts, a chain interconnecting the sprockets, and a bed plate carried by said sprockets for vertical adjustment. All of the foregoing is interconnected so that the purchaser may connect the attachment as a unit to the jointer bed. A spring plate is connected to the movable bed of the jointer for cooperation with the unit.