An imaging device of the present invention comprises an image data acquisition circuit for acquiring image data, a temporary storage for temporarily storing the image data, an image processing circuit for subjecting the image data that has been temporarily stored to image processing, a storage medium that can store at least some saved data of the image data that has been temporarily stored, a management information storage for storing management information for managing the save data, and a control circuit for, when the saved data is stored in the storage medium, carrying out management of the saved data using the management information.