A carrier, to which a first clutch and a second clutch are attached, the carrier for supporting a planetary gear in a planetary gear mechanism, comprising: a circular plate section including a first support section for supporting one end of a support pin of the planetary gear; a cylinder section arranged to be separated from the circular plate section in an axial direction of the circular plate section, the cylinder section including a second support section for supporting the other end of the support pin of the planetary gear, a first clutch attachment section for attaching to the first clutch, a second clutch attachment section for attaching to the second clutch, and a piston attachment section for attaching to a piston for driving the second clutch; a planetary gear arrangement section arranged between the circular plate section and the cylinder section in the axial direction, the planetary gear arrangement section including a space in which the planetary gear is arranged; and a first hydraulic fluid flow path including a first inlet which is provided in the circular plate section, the first hydraulic fluid flow path being provided at an inner section of the circular plate section and the cylinder section, the first hydraulic fluid flow path supplying hydraulic fluid, which is for lubricating the first clutch, from the first inlet to the first clutch attachment section; characterized by a second hydraulic fluid flow path including a second inlet which is provided in the circular plate section, the second hydraulic fluid flow path being provided at an inner section of the circular plate section and the cylinder section, the second hydraulic fluid flow path supplying hydraulic fluid, which is for driving the piston, from the second inlet to the piston attachment section. a circular plate section including a first support section for supporting one end of a support pin of the planetary gear; a cylinder section arranged to be separated from the circular plate section in an axial direction of the circular plate section, the cylinder section including a second support section for supporting the other end of the support pin of the planetary gear, a first clutch attachment section for attaching to the first clutch, a second clutch attachment section for attaching to the second clutch, and a piston attachment section for attaching to a piston for driving the second clutch; a second support section for supporting the other end of the support pin of the planetary gear, a first clutch attachment section for attaching to the first clutch, a second clutch attachment section for attaching to the second clutch, and a piston attachment section for attaching to a piston for driving the second clutch; a planetary gear arrangement section arranged between the circular plate section and the cylinder section in the axial direction, the planetary gear arrangement section including a space in which the planetary gear is arranged; and a first hydraulic fluid flow path including a first inlet which is provided in the circular plate section, the first hydraulic fluid flow path being provided at an inner section of the circular plate section and the cylinder section, the first hydraulic fluid flow path supplying hydraulic fluid, which is for lubricating the first clutch, from the first inlet to the first clutch attachment section; characterized by a second hydraulic fluid flow path including a second inlet which is provided in the circular plate section, the second hydraulic fluid flow path being provided at an inner section of the circular plate section and the cylinder section, the second hydraulic fluid flow path supplying hydraulic fluid, which is for driving the piston, from the second inlet to the piston attachment section.