Rotary machine

Provided is a rotary machine which can suppress progress of wear of a damper pin. In a rotary machine, platforms have damper abutting surfaces each in a shape of a flat surface extending in an axial line direction and each extending to be close to each other as approaching the outer side in the radial direction while opposing each other in the peripheral direction in each of the platforms adjacentto each other, and the damper pin includes a damper pin main body that forms a regular polygonal prism extending in the axial line direction and an angle formed by two side surfaces among a pluralityof side surfaces corresponds to an angle formed by the damper abutting surfaces adjacent to each other. 提供能够抑制减震器销的磨损的加大的旋转机械。在该旋转机械中，缘板具有减震器抵接面，所述减震器抵接面呈沿着轴线方向延伸的平面状，并且在相邻的缘板彼此之上互相在周向上对置，并以随着趋向径向外侧而互相接近的方式延伸，减震器销具有减震器销主体，该减震器销主体形成沿着轴线方向延伸的正多棱柱，并且多个侧面中的两个侧面所成的角度与相邻的减震器抵接面所成的角度对应。