A hydraulic machine of radial-piston type includes a plurality of pistons, a plurality of cylinders, a plurality of rollers disposed rotatably on the respective pistons; a cam configured to be rotatable about a center axis of the hydraulic machine; and a side plate mounted to a rotary section of the hydraulic machine and extending along the radial direction from the cam toward the pistons. One of the side plate or each of the plurality of rollers includes a resin portion forming one of a side plate surface or a roller end surface facing the roller end surface, while the other one includes a metal portion forming the other one of the side plate surface or the roller end surface. The metal portion includes a first region at which a distance along an axial direction of the rollers between the other surface including the metal portion and the surface including the resin portion is minimum, and a second region at which the distance is larger than that of the first region, the second region forming an edge portion of the first region. The second region forming the edge portion of the metal portion has a surface roughness of at most 0.8 µmRa.