A shaft drive type motorcycle includes a drive shaft, a constant-velocity universal joint interposed in the drive shaft, and the pinion gear provided at one end of the drive shaft and meshed with a final gear. A shaft part may be extended from a cup of the constant-velocity universal joint, the shaft part is provided with male splines, and a tubular part extends from the pinion gear. The tubular part is provided with female splines in which to fit the male splines, and the male splines and the female splines are coupled with each other.