There is provided an image processing device including capturing portions that respectively capture a first image and a second image that form an image for a right eye and an image for a left eye which can be stereoscopically viewed in three dimensions, a comparison portion that compares the first image and the second image captured by the capturing portions, a determination portion that determines, based on a comparison result of the comparison portion, which of the first image and the second image is the image for the right eye and which is the image for the left eye, and an output portion that outputs each of the first image and the second image, as the image for the right eye and the image for the left eye, based on a determination result of the determination portion.