1. An electronic document creating apparatus, comprising: a document identification information obtaining device configured to obtain and input document identification information put on a sheet document, said document identification information specifying an electronic document stored in a folder, said electronic document serving as an output source of the sheet document; an electronic document extraction device configured to extract an electronic document from the folder based on the document identification information; and a new document creation device configured to create a new electronic document by combining at least two electronic documents extracted by the electronic document extraction device, said new electronic document being stored in a folder.