Fuel vapor control device

A fuel vapor control device for regulating a flow amount of fuel vapor disposed in a fuel vapor control system for controlling fuel vapor, the fuel vapor control device comprising:

• a case defining a passage for fuel vapor;
• and
• a movable valve element which is accommodated in the case and is supported so as to be displaced in an axial direction in accordance with a pressure, the movable valve having a seating portion for switching between a regulating condition in which the flow amount of fuel vapor is regulated and a non-regulating condition in which a flow amount larger than the regulating condition is permitted by being seated to and being lifted from a fixed seat disposed on the case, wherein
• the movable valve element includes:
• a central cylindrical part extending straight along the axial direction, which defines a central channel as a main channel of which passage area is constant according to the displacement of the movable valve element;
• and
• a flange part which is disposed so as to extend outwardly from the central cylindrical part, defines a gap as a sub channel between the case, and has the seating portion on a location outwardly distanced from the central cylindrical part.