A communication device including: a transmission file setter which sets an upper limit value of a capacity of a file transmittable by e-mail; a transmission page setter which sets a page count of a transmission file; a communicator which divides, when the transmission file including multiple pages exceeds the upper limit value, the transmission file into multiple divided transmission files, and transmits the divided transmission files; a transmission setter which receives a combining configuration file for combining the divided transmission files, and the setting of a combining tool; and a controller which controls the transmission file setter, the transmission page setter, and the communicator. When the communicator transmits the plurality of divided transmission files, the controller causes the communicator to also transmit the combining configuration file and the combining tool for creating a file of the page count, in accordance with the setting of the transmission setter.