<p>A drawn image sharing apparatus for allowing images drawn on plural drawing objects to be shared among the drawing objects includes an image receive unit configured to receive an image transmitted from one or more other drawn image sharing apparatuses; an image display unit configured to display the image received by the image receive unit on a drawing object; a shared area image acquiring unit configured to acquire an image of a shared area of the image displayed by the image display unit; a difference image generating unit configured to generate a difference image indicating a difference in the shared area between the image displayed by the image display unit and the image acquired by the shared area image acquiring unit; and an image transmit unit configured to transmit the difference image to the one or more other drawn image sharing apparatuses.</p>
