This single-phase canister is provided with an adsorbent formed into a honeycomb shape for adsorbing evaporated fuel, and a storage chamber for storing the adsorbent. An external passage passing through the external surface of the adsorbent is formed inside the storage chamber, and a channel that passes through the inside of the adsorbent and the external passage is provided as a channel for the evaporated fuel to pass through the inside of the storage chamber.
