1. A moving picture coding method for coding a current block of a picture, the moving picture coding method comprising: deriving a first candidate having a first motion vector predictor derived from a first motion vector that has been used to code a first block; determining whether a total number of one or more candidates having the first candidate is less than a predetermined maximum candidate number; deriving a second candidate having a second motion vector predictor when the total number of the one or more candidates having the first candidate is less than the predetermined maximum candidate number; and coding an index corresponding to a candidate having a motion vector predictor, wherein the candidate is one of a plurality of candidates having the first candidate and the second candidate, and the predetermined maximum candidate number is fixed for all blocks in a slice of the picture.