A hydraulic rotating machine, comprising: a cylinder block configured to be rotated following rotation of a drive shaft; plural cylinders formed in the cylinder block and arranged at predetermined intervals in the circumferential direction of the drive shaft; pistons slidably inserted into the cylinders and configured to partition capacity chambers inside the cylinders; a swash plate configured to let the pistons reciprocate so that the capacity chambers are expanded and contracted following rotation of the cylinder block; a first biasing mechanism configured to bias the swash plate in accordance with supplied control pressure; a second biasing mechanism configured to bias the swash plate against the first biasing mechanism; and a regulator configured to control the control pressure led to the first biasing mechanism in accordance with self-pressure of the hydraulic rotating machine, characterized in that the second biasing mechanism has: a pressure chamber to which the self-pressure is led; and a control piston configured to be biased toward the swash plate by the self-pressure led to the pressure chamber, and the regulator has: a biasing member (51a, 51b) configured to bias the control piston toward the swash plate; and a control spool configured to be moved in accordance with biasing force of the biasing member (51a, 51b), the control spool being configured to adjust the control pressure. a cylinder block configured to be rotated following rotation of a drive shaft; plural cylinders formed in the cylinder block and arranged at predetermined intervals in the circumferential direction of the drive shaft; pistons slidably inserted into the cylinders and configured to partition capacity chambers inside the cylinders; a swash plate configured to let the pistons reciprocate so that the capacity chambers are expanded and contracted following rotation of the cylinder block; a first biasing mechanism configured to bias the swash plate in accordance with supplied control pressure; a second biasing mechanism configured to bias the swash plate against the first biasing mechanism; and a regulator configured to control the control pressure led to the first biasing mechanism in accordance with self-pressure of the hydraulic rotating machine, characterized in that the second biasing mechanism has: a pressure chamber to which the self-pressure is led; and a control piston configured to be biased toward the swash plate by the self-pressure led to the pressure chamber, and the regulator has: a biasing member (51a, 51b) configured to bias the control piston toward the swash plate; and a control spool configured to be moved in accordance with biasing force of the biasing member (51a, 51b), the control spool being configured to adjust the control pressure. a pressure chamber to which the self-pressure is led; and a control piston configured to be biased toward the swash plate by the self-pressure led to the pressure chamber, and the regulator has: a biasing member (51a, 51b) configured to bias the control piston toward the swash plate; and a control spool configured to be moved in accordance with biasing force of the biasing member (51a, 51b), the control spool being configured to adjust the control pressure.