A fuel pump that is provided outside of a fuel tank, for sucking fuel staying in the fuel tank and supplying the fuel to an engine, the fuel pump comprising: a drive shaft; a rotary swash plate fixed to the drive shaft; a cylinder; and a piston provided in such a manner as to be biased such that one end of the piston abuts against the rotary swash plate and be movable inside of the cylinder according to the rotation of the rotary swash plate, wherein the rotary swash plate includes: an annular rotary plate that abuts against the piston; and a bearing having a drive side first race fixed to the drive shaft, a driven side second race fixed to the annular rotary plate, and a plurality of rolling elements interposed between the first race and the second race, the bearing having an inclination axis inclined with respect to an axis of the drive shaft, and a straight line connecting contact points (511c, 512a) between the rolling element and the races (511, 512) not being perpendicular to the inclination axis, characterized in that the fuel pump is mounted on a motorcycle while placing the axis of the drive shaft in a substantially horizontal direction, the fuel pump further comprises a fuel suction port communicating with the fuel tank and a fuel sump chamber communicating with the fuel suction port and the cylinder, the rotary swash plate is disposed inside of the fuel sump chamber, the inclination axis of the bearing extends in a direction crossing a vertical direction, the fuel tank is disposed in the vicinity of an engine and an exhaust pipe in a motorcycle, and the bearing is disposed at the fuel sump chamber. a drive shaft; a rotary swash plate fixed to the drive shaft; a cylinder; and a piston provided in such a manner as to be biased such that one end of the piston abuts against the rotary swash plate and be movable inside of the cylinder according to the rotation of the rotary swash plate, wherein the rotary swash plate includes: an annular rotary plate that abuts against the piston; and a bearing having a drive side first race fixed to the drive shaft, a driven side second race fixed to the annular rotary plate, and a plurality of rolling elements interposed between the first race and the second race, the bearing having an inclination axis inclined with respect to an axis of the drive shaft, and a straight line connecting contact points (511c, 512a) between the rolling element and the races (511, 512) not being perpendicular to the inclination axis, an annular rotary plate that abuts against the piston; and a bearing having a drive side first race fixed to the drive shaft, a driven side second race fixed to the annular rotary plate, and a plurality of rolling elements interposed between the first race and the second race, the bearing having an inclination axis inclined with respect to an axis of the drive shaft, and a straight line connecting contact points (511c, 512a) between the rolling element and the races (511, 512) not being perpendicular to the inclination axis, characterized in that the fuel pump is mounted on a motorcycle while placing the axis of the drive shaft in a substantially horizontal direction, the fuel pump further comprises a fuel suction port communicating with the fuel tank and a fuel sump chamber communicating with the fuel suction port and the cylinder, the rotary swash plate is disposed inside of the fuel sump chamber, the inclination axis of the bearing extends in a direction crossing a vertical direction, the fuel tank is disposed in the vicinity of an engine and an exhaust pipe in a motorcycle, and the bearing is disposed at the fuel sump chamber.