An image processing apparatus including: a document table on which at least one document is arrangeable; an image input unit reading the document arranged on the document table; an individual image extractor extracting image data read by the image input unit on a document basis to obtain image data of an individual image; a storage storing association information between an arrangement status of the document with respect to the document table and a reading surface of the document to be read by the image input unit; an arrangement status determiner determining the arrangement status of the document with respect to the document table on the basis of the image data of the individual image; and a reading surface determiner determining the reading surface of the document read by the image input unit on the basis of the association information and the arrangement status determined by the arrangement status determiner.