Provided is an imaging device, including: an image acquisition unit for acquiring a plurality of images having different focal positions; an orientation acquisition unit for acquiring orientation information of the image acquisition unit; and an image processing unit for generating, from the plurality of images, an image having a depth of field which is enlarged compared to a depth of field of one of the plurality of images, in which a focal position setting value by which the focal position is determined is provided, and the focal position setting value is corrected based on the orientation information.