1. A moving picture coding method for coding a current block to be coded included in a current picture to be coded by inter predictive coding using a motion vector, the moving picture coding method comprising: coding a first flag indicating whether or not temporal motion vector prediction using a temporal motion vector predictor which is a motion vector of a block included in a coded picture different from the current picture is used; when the first flag indicates that the temporal motion vector prediction is used: coding a first parameter for calculating the temporal motion vector predictor; deriving, using the first parameter, a plurality of first motion vector predictor candidates including the temporal motion vector predictor; coding a motion vector used for performing inter predictive coding on the current block, using one of the first motion vector predictor candidates; when the first flag indicates that the temporal motion vector prediction is not used: deriving a plurality of second motion vector predictor candidates that do not include the temporal motion vector predictor; and coding a motion vector used for performing inter predictive coding on the current block, using one of the second motion vector predictor candidates, wherein when the first flag indicates that the temporal motion vector prediction is not used, the first parameter is not coded.