A continuous machining device includes: a film machining mechanism (3) that forms a hole (A) in a film (F); a holding mechanisms (4) being provided integrally with the film machining mechanism (3); a slider (2) that supports the film machining mechanism (3) and the holding mechanism (4) in a reciprocative manner relative to a feeding direction (P) of the film (F); and a return mechanism (5) that returns the film machining mechanism (3) and the holding mechanism (4) to their respective original positions defined on the opposite sides to the feeding direction (P) of the film (F). When the film (F) is held by the holding mechanism (4), the film machining mechanism (3) can be moved in synchronization with the film (F). Thus, after the hole (A) is formed in the film (F) by the film machining mechanism (3), the film machining mechanism (3) and the holding mechanism (4) can be returned to their respective original positions by the return mechanism (5) as soon as the film (F) is released from the holding mechanism (4).