There is provided a communication device, which is provided with a target time setting system that sets a determination target time to a time at which a predetermined setting operation is performed, and a determining system that determines whether the determination target time is within a certain transmittable time period. The communication device is further provided with a transmission time setting system that sets a transmission start time to the determination target time when the determination target time is within the certain transmittable time period, and shifts the determination target time so that the determination target time is within the certain transmittable time period when the determination target time is not within the certain transmittable time period, and a transmitting system that starts to communicate with a external device through a network at the transmission start time.