Disclosed is a panoramic image photographing apparatus including a camera module for photographing an image of subject, an image processing unit for generating preview image data according to an operating mode for panoramic photographing by the camera module, a storage unit for storing data of an image panoramic-photographed from the preview image data, a controller for setting a portion of image data stored in the storage unit as a first guide region, setting a portion of the preview image data as a second guide region, and for calculating a degree of accordance between the first guide region and the second guide region and a display unit for displaying, together with the preview image data, the degree of accordance of the second guide region with the first guide region on one screen.