Staying of a drain on a cylinder attached to a lower side of a valve casing is suppressed, and occurrence of corrosion of the cylinder is suppressed.A steam valve includes a valve casing, a valve disc disposed within the valve casing, a cylinder disposed on a lower side of the valve casing and having a piston rod extending upward, a valve stem vertically penetrating a lower portion of the valve casing and having one end coupled to the piston rod via a coupling and having another end coupled to the valve disc, a cover having a larger diameter than the piston rod and the coupling and configured to separate the piston rod and the coupling from each other by being interposed between the piston rod and the coupling, and a tubular skirt hanging down from a peripheral portion of the cover and surrounding a periphery of a head portion of...

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