To prevent abrasion due to vibration in relation to an adsorbent of a canister for recovering vapor fuel from a fuel tank and to improve an adsorbing/desorbing effect of the adsorbed vapor fuel.

The canister 7 is disposed in the intermediate position of a rear cross member 5 for hardly receiving vibration from wheels 10 and 11, and the adsorbent filled into the canister 7 hardly abrades due to the vibration. The canister 7 is disposed so as to contact with the external air at a position through which airflow passing through an engine passes. The airflow on the bottom part of a car body passes through the engine and then transmits heat of the engine to the canister 7 in a process of passing through the canister 7 with directly contacting with it. Thus, the adsorbent filled into the canister 7 can extend a service life of the canister 7 by promoting the adsorbing/ desorbing effect of the adsorbed vapor fuel with increasing of temperature.