A stitching method of a captured image is disclosed. The stitching method includes capturing a plurality of images having different viewing angles, setting a feature point extraction region on the plural images, extracting a plurality of feature points from a plurality of objects in the set region, extracting a combination line connecting corresponding feature points based on the plural extracted feature points, outputting the extracted combination line, and combining the plural images based on the extracted combination line. Accordingly, the stitching method provides an effective and high-quality stitched image.