An oil filler device on an internal-combustion engine includes a filler neck having an oil filler opening and a closing lid for closing the filler opening. The closing lid has a cup-shaped closing cap which therefore has a bottom and a wall, a sealing device and a centering element interacting with a filler neck. The closing lid is equipped in the center on the bottom with a fastening section constructed as a flange, which fastening section reaches through the centering element and the centering element is fastened on the fastening section. In order to promote a dripping-off of oil situated on the interior side of the closing cap, it is provided that, for the fastening of the centering element on the fastening section, a holding ring is fitted onto the fastening section. The holding ring, on its ring opening, has radially inwardly projecting fastening lugs which extend diagonally with respect to the bottom and are applied to the fastening section. A drip nose extends away from the bottom on the centering element and the centering element rests by its interior circumferential surface flatly against the fastening section and by its exterior circumferential surface flatly against the interior side of the neck.