An imaging device comprising: an imaging unit configured to convert an image light incident through a lens to an electrical image signal in a set imaging timing which is timing at which imaging is started at the imaging unit and exposure period which is the period in which light is exposed to the imaging unit; a signal processing unit configured to process the image signal output from the imaging unit to obtain an image data for output; a video output terminal configured to output the image data obtained at the signal processing unit; a synchronizing signal output terminal configured to output synchronization data to another imaging device, the synchronization data, including horizontal blanking periods and vertical blanking periods, being arranged to synchronize the another imaging device; and an imaging control unit configured to: control the imaging timing at the imaging unit and to control transmitting the synchronization data of the imaging timing and of the exposure period at the imaging unit to the other imaging device through the synchronization signal output terminal, wherein the imaging control unit is configured to add to a horizontal blanking period of the synchronization data, actual imaging timing at which an image is taken by the imaging unit and to add to a vertical blanking period of the synchronization data, current imaging frame period or a frame frequency and data of a delay period which indicates the delay between taking the image at the imaging unit and output of the image data at the output portion, and wherein the imaging control unit is configured to control the imaging unit to take an image at the imaging unit when the time corresponding to the added actual imaging timing has come. an imaging unit configured to convert an image light incident through a lens to an electrical image signal in a set imaging timing which is timing at which imaging is started at the imaging unit and exposure period which is the period in which light is exposed to the imaging unit; a signal processing unit configured to process the image signal output from the imaging unit to obtain an image data for output; a video output terminal configured to output the image data obtained at the signal processing unit; a synchronizing signal output terminal configured to output synchronization data to another imaging device, the synchronization data, including horizontal blanking periods and vertical blanking periods, being arranged to synchronize the another imaging device; and an imaging control unit configured to: control the imaging timing at the imaging unit and to control transmitting the synchronization data of the imaging timing and of the exposure period at the imaging unit to the other imaging device through the synchronization signal output terminal, wherein the imaging control unit is configured to add to a horizontal blanking period of the synchronization data, actual imaging timing at which an image is taken by the imaging unit and to add to a vertical blanking period of the synchronization data, current imaging frame period or a frame frequency and data of a delay period which indicates the delay between taking the image at the imaging unit and output of the image data at the output portion, and wherein the imaging control unit is configured to control the imaging unit to take an image at the imaging unit when the time corresponding to the added actual imaging timing has come.