A data transmitting apparatus for transmitting data to a communication recipient by one-way communication includes a data transmitting unit transmitting data to the communication recipient by the one-way communication of a predetermined communication format; a data selecting unit allowing a user to select the data to be transmitted by the one-way communication; an instruction inputting unit allowing the user to input an instruction to transmit the data selected by the data selecting unit to the communication recipient by the one-way communication; a control unit controlling the data transmitting unit to transmit the data selected by the data selecting unit to the communication recipient by the one-way communication on the basis of the instruction input through the instruction inputting unit; and a detecting unit detecting successive inputs that the instruction to transmit the same data to the communication recipient by the one-way communication is successively input by the instruction inputting unit, when the data selecting unit selects the same data, wherein the control unit controls the data transmitting unit to change the communication format of the one-way communication when the detecting unit detects the successive inputs.