A moving picture encoding method which generates a predicted image using information on motion vectors and information on reference images, the moving picture encoding method having multiple prediction modes including a mode without motion vector encoding, including: a step of selecting a frame(s) to be referenced to in the prediction of each prediction direction in the prediction mode from among multiple candidate reference frames, and a step of selecting motion vector information used in the prediction mode, wherein said step of selecting motion vector information is performed based on whether blocks adjacent to a current block have a motion vector; and moving picture encoding is performed by generating said predicted image using the information on said selected reference frame and the information on said selected motion vectors in said prediction mode.