A power transfer unit for extracting torque from a transmission of an automobile, comprising: a casing having a first side having a coupling portion for combining with the transmission and a second side opposed to the first side; a first shaft being rotatably supported by a first bearing and a second bearing and combining with the transmission to receive the torque; a second shaft being rotatably supported by a third bearing and a fourth bearing and gearing with the first shaft to rotate in parallel with the first shaft , the second shaft comprising a bevel gear ; and a third shaft being rotatably supported by the casing and extending in a direction distinct from the first shaft and the second shaft , the third shaft comprising an internal end including a pinion gear in mesh with the bevel gear and an external end led out of the casing , wherein the first bearing is disposed closer in a lateral direction to the coupling portion than the bevel gear and the pinion gear are, wherein the first side comprises a first race fitting on an entire circumference of the first bearing and a third race fitting on an entire circumference of the third bearing , the second side comprises a second race fitting on an entire circumference of the second bearing and a fourth race fitting on an entire circumference of the fourth bearing , and wherein the casing is dividable into a first part including the first side and a second part including the second side, characterized in that : the first shaft penetrates the casing from the coupling portion to the second side of the casing , and the first bearing and the third bearing sit on the first part , and the second bearing and the fourth bearing sit on the second part . a casing having a first side having a coupling portion for combining with the transmission and a second side opposed to the first side; a first shaft being rotatably supported by a first bearing and a second bearing and combining with the transmission to receive the torque; a second shaft being rotatably supported by a third bearing and a fourth bearing and gearing with the first shaft to rotate in parallel with the first shaft , the second shaft comprising a bevel gear ; and a third shaft being rotatably supported by the casing and extending in a direction distinct from the first shaft and the second shaft , the third shaft comprising an internal end including a pinion gear in mesh with the bevel gear and an external end led out of the casing , wherein the first bearing is disposed closer in a lateral direction to the coupling portion than the bevel gear and the pinion gear are, wherein the first side comprises a first race fitting on an entire circumference of the first bearing and a third race fitting on an entire circumference of the third bearing , the second side comprises a second race fitting on an entire circumference of the second bearing and a fourth race fitting on an entire circumference of the fourth bearing , and wherein the casing is dividable into a first part including the first side and a second part including the second side, the first shaft penetrates the casing from the coupling portion to the second side of the casing , and the first bearing and the third bearing sit on the first part , and the second bearing and the fourth bearing sit on the second part . <EOS>