Swash plate and hydraulic rotary machine

The swash plate (7) is provided with an insertion hole (70) into which a rotating shaft of the hydraulic rotating machine is inserted. The swash plate (7) includes a central extension portion (71) extending in a manner so as to traverse the insertion hole (70); and a pair of shoulder parts (72) provided on both sides of the central extension part (71). Each shoulder (72) has a convex surface (73) having an arc-shaped cross-section. The convex surface (73) of each shoulder part (72) is provided with an arc-shaped rib (75) protruding along the side surface of the central extension part (71). 斜板（7）上设有被液压旋转机械的旋转轴插通的插通孔（70）。斜板（7）包括以横断插通孔（70）的形式延伸的中央延伸部（71）；和设于中央延伸部（71）的两侧的一对肩部（72）。各肩部（72）具有截面圆弧状的凸面（73）。各肩部（72）的凸面（73）上设有沿着中央延伸部（71）的侧面突出的圆弧状的肋（75）。