An improved image transmission apparatus capable of reducing the amount of work involved in the checking and transmission operations performed by the user at the time of image data transmission, the apparatus including an address accept unit that accepts input of a first address and a second address, a reader that reads an original document to obtain data pertaining thereto, a first transmission unit that sends original document data obtained by the reader to the first address, a receiving unit that receives a reply from the first address responding to the transmission by the first transmission unit, and a second transmission unit that sends the original document data to the second address when the receiving unit receives from the first address a reply indicating acceptability of the original document data.