Canister

A canister comprising:

• a casing internally provided with an adsorbing layer that comprises an adsorbing material capable of adsorbing and desorbing fuel vapor;
• a tank port provided at one end of the casing and configured to allow the fuel vapor to flow into the casing;
• a purge port provided at the one end of the casing and configured to allow the fuel vapor to flow out of the casing;
• an air port provided at another end of the casing and configured to allow air to flow into and out of the casing;
• a first adsorbing layer provided inside the casing, and comprising a first adsorbing material as the adsorbing material, and wherein the first absorbing layer is disposed at a position in contact with the air port at the other end in a flowing direction of the fuel vapor between the one end and the other end;
• and
• a second adsorbing layer provided inside the casing, and comprising a second adsorbing material different from the first adsorbing material, and wherein the second absorbing material is disposed closer to the one end than the first adsorbing layer is in the flowing direction, and
• wherein the first adsorbing material adsorbs the fuel vapor at an adsorbing rate that is higher than an adsorbing rate of the second adsorbing material.