The present invention relates to a facsimile apparatus for providing a
single/dual side mixture mode capable of transmitting and receiving
original images including single/dual side mixture efficiently. Under
control of a CPU 22, information indicating presence/absence of back side
image information corresponding to transmission/reception image
information is informed together with page number and image front/back
information, by a post message signal transmitted from a transmitter to a
receiver. If the image information read from a back side of an original
is substantially entire-white, the transmitter omits transmission of back
side image information having the entire-white. In this case, by
informing information indicating absence of back side image information
corresponding to front side image information from the transmitter to the
receiver by the post message signal, single/dual side mixture image
informations can be transmitted and received.