A vaporized fuel adsorbing canister constituting a vaporized fuel adsorbing system of an internal combustion engine including a hollow body filled with a charge of vaporized fuel adsorbing agent for collecting a vaporized fuel thereon and having two filter members each mounted at one of opposite ends thereof and supported by a grid. A porous material member formed with at least more than one vaporized fuel permeating opening for collecting oil and fat thereon is located between one of the grids and a vaporized fuel inlet port, so that liquefied fuel introduced through the vaporized fuel inlet port into the hollow body can be led to the porous material member and the oil and fat that might be incorporated in the liquefied fuel can be collected on the porous material member.
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