1. An imaging processing device comprising: position information generation means for, on the basis of a plurality of captured images which are obtained through image capturing by image capturing means while the image capturing means is moved, generating position information which represents a relative positional relationship of the captured images when the plurality of the captured images are aligned on a predetermined plane so as to overlap same subjects, which are included in the different captured images, with each other; strip image generation means for, for each of the plurality of the captured images, cutting out an area on the captured image from a predetermined reference position on the captured image to the reference position on another captured image which is aligned on the plane so as to overlap with the captured image and generating a strip image including the area, when the plurality of the captured images are aligned on the plane on the basis of the position information; and panoramic image generation means for generating one panoramic image by aligning and stitching the strip images which are obtained from the plurality of the captured images, wherein the strip image generation means generates a plurality of the strip images from the captured images while shifting the areas on the captured images in a predetermined direction relative to the plurality of the captured images, and wherein the panoramic image generation means generates an image group formed of a plurality of the panoramic images, in which an area on an image capturing space set as an image capturing target at the time of the image capturing for obtaining the plurality of the captured images is displayed, by generating the panoramic image for each position of the area.