An image decoding method includes a constraint information decoding step of decoding constraint information indicating prohibition of reference from a target tile, which is one of a plurality of tiles obtained by partitioning a picture, to another tile, and a list generation step of generating a prediction motion vector list including a plurality of prediction motion vector candidates and a plurality of prediction motion vector indices each associated with a corresponding one of the plurality of prediction motion vector candidates. In the list generating step, a prediction motion vector list not including a temporal motion vector of a block on a lower right side of the target block is generated.