Canister

A canister, comprising:

• a casing including
• a casing body formed into a bottomed tubular shape with an end wall at one end thereof, and
• a lid member for closing the other end of said casing;
• a partition wall which extends toward the lid member, one end of the partition wall connected to said end wall, opposite sides of the partition wall are connected to an inner surface of said casing body;
• first and second filters fixedly disposed within said casing body on opposite surfaces of said partition wall, wherein first and second chambers are formed between said first and second filters and said end wall, respectively;
• support plate fitted to the other end of said casing body, said support plate has a large number of communication bores permitting a gas to flow therethrough;
• a third filter superposed and carried on an inner surface of said support plate, said third filter being disposed at a distance from the other end of said partition wall;
• first and second adsorbent layers, formed by adsorbents, are retained between said first and second filters and said third filter, respectively;
• a third chamber defined between said support plate and said lid member;
• a spring, accommodated with said third chamber, for biasing said support plate in a direction to compress said first and second adsorbent layers;
• and
• an inclination inhibiting portion provided on at least one of said casing body and said partition wall, said inclination inhibiting portion provided on an opposite side from said third chamber with respect to said third filter and said support plate, wherein a distance between said inclination inhibiting portion and said third filter substantially corresponds to a distance between said third filter and said partition wall.