To provide a drive power transmitting section structure of a vehicle, capable of enhancing transmitting efficiency by reducing a joint angle of a constant velocity joint, and improving the assembling capability and the maintenance capability.

A pair of drive shafts 177, 178 has the constant velocity joints 184, 185 at ends. A bearing section 176 is provided at the constant velocity joints 184, 185 in the drive power transmitting section structure of an irregular ground travel vehicle for transmitting the drive power from a power unit to right and left rear wheels which are independently suspended by the drive shafts 177, 178. The bearing section 176 connects a final gear case 133 provided at a vehicle body side and is constituted so that the constant velocity joints 184, 185 are freely detachable from the final gear case 133 in a right-and-left independent manner.