A vapor deposition device (50) includes a mask (60) having periodic patterns, and only a region of the mask (60) where a one-period pattern is formed is exposed. A length of the mask base material along a direction perpendicular to a long-side direction of the mask base material is shorter than a length of a film formation substrate (200) along a direction of scanning of the film formation substrate (200). The mask (60) is provided so that the long-side direction of the mask base material is perpendicular to the direction of scanning and that the exposed region is allowed to move in a direction perpendicular to the direction of scanning by rotation of a wind-off roll (91) and a wind-up roll (92).