An image photographing device (1), which converts an optical image of a subject into an electric signal by an image pick up device, and stores image data by the electric signal in an information recording medium (21), includes a communication interface (25), which communicates the image data, a determination device (31), which determines whether a device connected to the communication interface is an external device (2) or a release device (3), a communication process device (10), which conducts a communication process with the external device if the determination device determines that the external device is connected, and a photographing process device (10), which conducts a photographing process if the determination device determines that the release device is connected.