PURPOSE: To obviate changing a trams-axle case in shape because of the type of lubricant introduction passage and the like by disposing a lubricant receiving body which introduces lubricant to the bearing side of a drive shaft after the body has received lubricant raked up by the rotation of a drive chain.

CONSTITUTION: A driving sprocket 40 is fixedly provided for a transfer pinion shaft in the transfer section of a trans-axle 2, a driven sprocket 44 is also fixedly provided for an extension shaft, and a drive chain 54 is concurrently installed between the respective sprockets 40 and 44. In this case, a lubricant receiving body 78 is provided between the respective sprockets 40 and 44 and between the upper and lower sides of the drive chain 54, And the lubricant receiving body 78 is made up of a lubricant receiving port section 80 receiving lubricant raked up by the drive chain 54, a lubricant introducing section 80 introducing lubricant in the lubricant receiving port to the side of a retainer, and of an installation section 84 fitted onto a light case 6 with an installation bolt 76.