The invention provides a multi-film forming apparatus including a substrate holder stock chamber for storing a plurality of substrate holders separately from a path in the multi-film forming apparatus, so that production can be performed without being affected by the process of removing a film accumulated on the surface of the substrate holder and the process of replacing the substrate holder, or by the process of removing a film accumulated on the surface of the substrate holder or the process of replacing the substrate holder, and hence high-throughput production is possible. A branch path is provided on the path of the multi-film forming apparatus, and a substrate holder stock chamber for storing a plurality of substrate holders which enables retrieval of the substrate holder from the path and feeding of the substrate holder to the path is provided.