A motion vector is derived with high accuracy while avoiding deriving of an erroneous motion. A stereoscopic image display device 100 includes an image acquisition unit 148 for acquiring stereoscopic image data and a vector deriving unit 158 that derives correlation values representing correlation strength between each reference-part image data constituting image data in segmented areas of an arbitrary first frame 204 of the stereoscopic image data and objective-part image data being image data in segmented areas of a second frame 206 different from the first frame and that extracts the objective-part image data having the highest correlation value to the reference-part image data to derive the motion vector, with respect to each reference-part image data. The vector deriving unit derives the correlation values between the reference-part image data and the objective-part image data, both of which belong to the right-eye image data 202b, or the correlation values between the reference-part image data and the objective-part image data, both of which belong to the left-eye image data 202a.