An imaging device shoots a common subject in synchronization with other imaging devices. The imaging device includes a processor. The processor receives states of the other imaging devices, compare an own state of the imaging device with the received states of the other imaging devices, and determine whether the imaging device functions as a main device or a subordinate device for setting an imaging condition. When the processor determines that the imaging device functions as the main device, the processor sends imaging information acquired or determined by the imaging device for shooting the common subject to the subordinate devices. When the processor determines that the imaging device functions as the subordinate device, the processor sets the imaging condition in the imaging device based on the imaging information received from the main device.