Abstract: A printing apparatus includes a facsimile data receiving unit for receiving a reception request signal and print data which are transmitted through a telephone line; a computer data receiving unit for receiving print data transmitted through a line different from a telephone line; a printing unit for printing each of the print data received by the facsimile data receiving unit and the computer data receiving unit on a medium; and a mode setting unit for selectively setting a first mode in which, when the facsimile data receiving unit receives the reception request signal and the printing unit is printing the print data received by the computer data receiving unit, the printing process of the computer data is interrupted thereby allowing the printing unit to execute a printing operation of the print data from the facsimile data receiving unit in accordance with the reception request signal, and a second mode in which when the facsimile data receiving unit receives the reception request signal and the printing