FUEL STORAGE DEVICE

To suppress the influence of gas on other fuel tanks when the gas is discharged from a fuel tank. A fuel storage device includes: a plurality of fuel tanks, each having a fusible plug valve; a support member that supports the plurality of fuel tanks, while making longitudinal directions of the respective fuel tanks parallel to each other; and a blocking member that blocks at least part of the fuel gas discharged from the fusible plug valves. The plurality of fuel tanks includes a tank group including the plurality of fuel tanks aligned along a first direction and a juxtaposed tank thereto. The blocking member is disposed between the tank group and the juxtaposed tank. The orientations of openings of the fusible plug valves included in blocked tanks are directed toward the blocking member, the blocked tanks being two or more fuel tanks that are continuous in the first direction, among the fuel tanks included in the tank group.