A steam valve (10, 11, 13, 14, 15, 16, 17) extending in an axial direction from a top to a bottom and comprising: a first valve element provided to be movable in the axial direction, the first valve element being configured to adjust a flow rate of steam; a second valve element provided at a downstream side of the first valve element coaxially with the first valve element to be movable in the axial direction, the second valve element being configured to shut off a flow of the steam; a valve seat with which the first valve element and the second valve element come into and out of contact; a guide tube slidably supporting a valve rod including the second valve element, and having a flange portion protruding outward all over a circumferential direction, at the bottom of the steam valve (10, 11, 13, 14, 15, 16, 17); a casing housing the first valve element, the second valve element, the valve seat, and the guide tube; characterized in that the steam valve further comprises: a drain discharge hole formed in a sidewall of the casing at the bottom of the steam valve; a drain pipe provided with a shutoff valve and communicating with the drain discharge hole; and a flow direction changing part which is configured to change a direction in which the steam, having passed between the first valve element and the valve seat and flowing along the guide tube, flows toward the drain discharge hole, the flow direction changing part being provided to the guide tube, wherein the flow direction changing part is a ridge part protruding outward from a side surface of the guide tube opposite the drain discharge hole and extending in the axial direction. a first valve element provided to be movable in the axial direction, the first valve element being configured to adjust a flow rate of steam; a second valve element provided at a downstream side of the first valve element coaxially with the first valve element to be movable in the axial direction, the second valve element being configured to shut off a flow of the steam; a valve seat with which the first valve element and the second valve element come into and out of contact; a guide tube slidably supporting a valve rod including the second valve element, and having a flange portion protruding outward all over a circumferential direction, at the bottom of the steam valve (10, 11, 13, 14, 15, 16, 17); a casing housing the first valve element, the second valve element, the valve seat, and the guide tube; characterized in that the steam valve further comprises: a drain discharge hole formed in a sidewall of the casing at the bottom of the steam valve; a drain pipe provided with a shutoff valve and communicating with the drain discharge hole; and a flow direction changing part which is configured to change a direction in which the steam, having passed between the first valve element and the valve seat and flowing along the guide tube, flows toward the drain discharge hole, the flow direction changing part being provided to the guide tube, wherein the flow direction changing part is a ridge part protruding outward from a side surface of the guide tube opposite the drain discharge hole and extending in the axial direction. a drain discharge hole formed in a sidewall of the casing at the bottom of the steam valve; a drain pipe provided with a shutoff valve and communicating with the drain discharge hole; and a flow direction changing part which is configured to change a direction in which the steam, having passed between the first valve element and the valve seat and flowing along the guide tube, flows toward the drain discharge hole, the flow direction changing part being provided to the guide tube, wherein the flow direction changing part is a ridge part protruding outward from a side surface of the guide tube opposite the drain discharge hole and extending in the axial direction.