PURPOSE: To provide a carrier for a bicycle, capable of being extended backward from a frame, and whose loading surface in extending is flush with that in not extending.

CONSTITUTION: An extension carrier 8 to be turned around a shaft O in the frame width direction is provided on a carrier main body 6 attached and fixed on the rear wheel upper part of a two-wheeled bicycle, and having a flush loading surface 6A. And a housing part in which the extension carrier 8 is housed when the carrier 8 is forwardly turned and a supporting part 15 for restraining the downward turning of the extension carrier 8 when the extension carrier 8 is backwardly turned and extended backward from the carrier main body 6, and also when the loading surface 8A of the extension carrier 8 is flush with the loading surface 6A of the carrier main body 6 are provided.