Abstract: An apparatus for feeding sheets such as labels or covers includes a holder having a groove-shaped cross section opening upwardly. The holder is formed with a take-out port at one end, and holds the covers stacked horizontally with their surfaces facing horizontally. A pressing body connected to a rodless cylinder presses the stacked covers with a constant force towards the take-out port. A suction machine having a sucking disk at one end confronting a cover exposed from the take-out port attracts the exposed cover one-by-one. A stepping motor coupled to the suction machine turns the suction machine downwardly to 90.degree. so that the cover attracted to the sucking disk abuts against a top aperture of a container which is carried on a conveyor. When the suction machine releases the attraction of the cover, the cover is left on the top aperture of the container to cover the top aperture.