1. A method for coding a motion vector comprising the steps of; computing two-dimensional prediction error information by using a motion vector to be coded and the n (n&gE;1) number of neighboring motion vectors; selecting prediction error information having the minimum bitrate from the computed prediction error information; obtaining mode information indicative of a neighboring motion vector which has occurred the prediction error information of the minimum bitrate; and coding the obtained prediction error information of the minimum bitrate and the mode information.