An image erasing apparatus includes a scanning unit configured to scan an image on a sheet and a mark printing area on the sheet where one or more marks may be printed, an erasing unit configured to erase the image from the sheet, a marking unit configured to put a mark on the sheet from which the image is erased, and a control unit. The control unit is configured to determine a number of the marks printed on the sheet based on the scanned mark printing area, determine an image area based on the scanned image, and determine a position of the mark to be put on the sheet by the marking unit based on the determined number of the marks and the determined image area.