To provide a moving image encoder capable of accurately and efficiently performing encoding processing.

This moving image encoder is provided with a first predictive motion vector generating means 101 for generating a first predictive motion vector for a target area on the basis of a known motion vector of an adjacent area adjacent to the target area to be a target of encoding processing; a motion vector generating means 100 for generating a motion vector for the target area on the basis of the first predictive motion vector, an encoding information generating means for generating encoding information to be used at the time of encoding the target area on the basis of the motion vector; a second predictive motion vector generating means 112 for generating a second predictive motion vector for the target area on the basis of the encoding information; and an encoding means 111 for encoding an image of the target area on the basis of the second predictive motion vector.