A vibration suppression device (100; 200; 300) for heat transfer tubes, in which a plurality of heat transfer tube layer is formed by radially arraying a plurality of heat transfer tubes with a predetermined space, a heat transfer tube bundle is formed by stacking the plurality of the heat transfer tube layers, and the heat transfer tube layers adjacent to one another are disposed to shift in an arraying direction, comprising: a vibration suppression member (102; 202; 302) disposed between the plurality of heat transfer tube layers, wherein the vibration suppression member (102; 202; 302) includes a first support member (111; 211; 311) including a first support surface (112; 212) for supporting an outer surface of the heat transfer tube on one surface side; and a second support member (121; 221; 321) including a second support surface (132; 135; 232) and a third support surface (133; 136; 233) which tilt at different predetermined tilt angles relative to the first support surface (112; 212) respectively for supporting the outer surface of the heat transfer tube on one surface side, and another surface of the second support member (121; 221; 321) is fixed to another surface of the first support member (111; 211; 311), wherein the first support member (111; 211; 311) has a flat plate shape with a predetermined length, the first support surface (112; 212) is a plane continuously formed on the one surface side, the second support member (121; 221; 321) extends along a longitudinal direction with a predetermined length and has a plurality of concave parts (122; 222) and a plurality of convex parts (124; 224) which are alternately and continuously formed, the second support surface (132; 135; 232) and the third support surface (133; 136; 233) are opposed planes relative to the concave part (122; 222), and the second support members (121; 221; 321) adjacent to each other in the stacking direction of the heat transfer tube layer are arrayed such that the concave part (122; 222) and the convex part (124; 224) face each other, characterised in that the plurality of concave parts (122; 222) of the second support member (121; 221; 321) is intermittently fixed to the first support member (111; 211; 311), and a predetermined gap is formed at a position where the concave part (122; 222) of the second support member (121; 221; 321) and the first support member (111; 211; 311) are not fixed to each other. a vibration suppression member (102; 202; 302) disposed between the plurality of heat transfer tube layers, wherein the vibration suppression member (102; 202; 302) includes a first support member (111; 211; 311) including a first support surface (112; 212) for supporting an outer surface of the heat transfer tube on one surface side; and a second support member (121; 221; 321) including a second support surface (132; 135; 232) and a third support surface (133; 136; 233) which tilt at different predetermined tilt angles relative to the first support surface (112; 212) respectively for supporting the outer surface of the heat transfer tube on one surface side, and another surface of the second support member (121; 221; 321) is fixed to another surface of the first support member (111; 211; 311), wherein the first support member (111; 211; 311) has a flat plate shape with a predetermined length, the first support surface (112; 212) is a plane continuously formed on the one surface side, the second support member (121; 221; 321) extends along a longitudinal direction with a predetermined length and has a plurality of concave parts (122; 222) and a plurality of convex parts (124; 224) which are alternately and continuously formed, the second support surface (132; 135; 232) and the third support surface (133; 136; 233) are opposed planes relative to the concave part (122; 222), and the second support members (121; 221; 321) adjacent to each other in the stacking direction of the heat transfer tube layer are arrayed such that the concave part (122; 222) and the convex part (124; 224) face each other, characterised in that the plurality of concave parts (122; 222) of the second support member (121; 221; 321) is intermittently fixed to the first support member (111; 211; 311), and a predetermined gap is formed at a position where the concave part (122; 222) of the second support member (121; 221; 321) and the first support member (111; 211; 311) are not fixed to each other.