A drive power transmitting system for a rough-terrain traveling vehicle (10) includes a pair of drive shafts (177, 178) for transmitting drive power from a power unit (18) to respective right and left independently suspended rear wheels (21, 21). Right and left constant velocity joints (184, 184) are provided on respective opposed ends of the drive shafts. A bearing unit (176) is provided on each constant velocity joint for connecting the same to a final gearcase (133) provided on a vehicle body so that the left and right constant velocity joints are releasably connected to the final gearcase individually.