To improve practical usefulness by performing the high-quality transmission of a facsimile image corresponding to the ability of a transmission party.

An image transmitter 18 is provided with a data receiving part for receiving print data transmitted from terminals 20 and 28 and the address data of transmission destination facsimile equipment 27 and separating these respective data, a print data interpreting part for expanding the received print data into picture image on the basis of the paper size and resolution of the transmission destination facsimile equipment, an image converting part for converting the expanded picture image to the facsimile image of a format matched to the transmission destination facsimile equipment, and an image transmitting part for transmitting the converted facsimile image to the facsimile equipment designated by the transmission destination address data.