A radiographic image erasing device includes: a first light source that applies first erase light including a wavelength in the ultraviolet region to a storage phosphor sheet in which a radiographic image has been stored and recorded; a second light source that is placed at a height identical to that of the first light source and applies second erase light including a wavelength of a longer wavelength than that of the first erase light to the storage phosphor sheet to which the first erase light has been applied; drive mechanisms that switch the orientations or positions of the first light source and the second light source; and a controller that controls the drive mechanisms in accordance with a conveyance direction of the storage phosphor sheet such that the first erase light and the second erase light are applied in this order to the storage phosphor sheet.