Image decoding method, image encoding device, and image decoding device

An image coding method includes: adding, to a candidate list, a first adjacent motion vector as a candidate for a predicted motion vector to be used for coding the current motion vector (S701); selecting the predicted motion vector from the candidate list (S702); and coding the current motion vector (S703), wherein in the adding (S701), the first adjacent motion vector indicating a position in a first reference picture included in a first reference picture list is added to the candidate list for the current motion vector indicating a position in a second reference picture included in a second reference picture list.