A fuel cutoff valve includes: a casing main body having a valve chamber and a connecting hole to connect the valve chamber to the exterior of the fuel tank; a cover which has a pipe passageway which communicates with the exterior and which is connected to the connecting hole; a bottom member which has an induction chamber which has an opening portion through which liquid fuel and fuel vapor are allowed to flow and a distribution hole which communicates with the valve chamber; and a float configured to ascend and descend according to a fuel level in the fuel tank to close and open the connecting hole, wherein the bottom member has a guiding plate in the induction chamber, the guiding plate being formed into a shape of a recess portion which is oriented towards the opening portion in an axial section.