Abstract: An imaging device includes an operation unit that instructs an operation by operation input, an imaging control unit that controls an operation of an imaging unit having a first imaging element, a counting unit that counts the number of generation times of the vertical synchronization signal, and a control unit that calculates the number of generation times of the vertical synchronization signal inserted between second processing frames based on a difference value between the number of generation times of the vertical synchronization signal generated by a second imaging element of the other imaging device and inserted between the second processing frames and the number of generation times of the vertical synchronization signal inserted between first processing frames, so as to notify the other imaging device of timing to start an instructed operation and an instruction, and perform the notified operation after elapse of a predetermined period.