A data entry apparatus for an electrophotographic copying machine which forms an image of a document on a photoconductor and transfers the image to a paper, including data input keys for specifying data to be written, a position entry device for specifying an area on a document in the unit of a block which can divide the whole area of the document into a plurality of blocks and for displaying those blocks on a panel in order to choose either one of them, a data write member for writing entered data on an area of the photoconductor corresponding to the area specified with respect to the document while the light from the specified are of the document cut off is also provided.