EVAPORATED FUEL TREATMENT DEVICE

Provided is an evaporated fuel treatment device including a first coupling portion, a second coupling portion, a first accommodating portion and a second accommodating portion. The first accommodating portion is configured to be disposed so as to be in communication with the first coupling portion and the second coupling portion, and to accommodate a first adsorbent. The second accommodating portion is configured to be disposed so as to be in communication with the first coupling portion via the first accommodating portion, and to accommodate a second adsorbent. The evaporated fuel adsorption capacity of the first adsorbent is lower than the evaporated fuel adsorption capacity of the second adsorbent.