PURPOSE: To accomodate the oversupplying of a film upon completion of winding, by providing an elastically supported guide member between a film supply part and a sprocket and applying specified tension on the film.

CONSTITUTION: A roll 3 which is a guide member supported elastically with a leaf spring 44 is provided together with a roll 45 which is a stationary guide member between a film supply part 23 and a sprocket 3 for feeding a film 6 electrically. Specified tension is applied on the film 6 by the displacement of the film 44 and the film 6 fed with the sprocket 3 is taken up on an electrically driven take-up spool 24. When the part 23 is idled by inertia upon completion of the taking-up of the film 6, the displacement of the spring 44 is elastically reset, whereby the oversupplying of the film 6 is accomodated and the slackening generated in the film 6 is prevented. The exposure at the press plate 12 in the aperture part 2 of the guide device for long-sized film is thus accomplished satisfactorily.