A capturing device includes: an image sensor generating an image signal; a storage unit setting a second region in a first region; a timing adjusting unit adjusting a timing at which the image signal is read out to write the image signal in the storage unit, and a timing at which the image signal is read out from the storage unit; an image conversion processing unit performing a predetermined process on the image, alternately writing a first image signal corresponding to a full image or a second image signal corresponding to a partial image in the first region in a different frame period, and writing an image signal that is different from the image signal written in the first region in the second region; and an output unit converting and outputting the first and second image signals into an image signal in a predetermined format.