An image editing apparatus capable of easily setting an aspect ratio for use when edited image data are output. The image editing apparatus includes a determination unit for determining, among a plurality of images, which of vertically long images or horizontally long images are larger in the number of images, a decision unit for deciding an aspect ratio of images which are the largest in the number of images among the vertically or horizontally long images, whichever are determined as being larger in number by the determination unit, and an output unit for outputting the plurality of images at the aspect ratio decided by the decision unit.