A power transmission 1 includes an output shaft 9 disposed in parallel to an input shaft 5, and provided at one end with an output gear 35 and at an opposite end with a final drive gear 36 meshing with a final driven gear 37 of a differential device 10, the output gear 35 normally meshing with a reverse speed drive gear 26, and with a first speed driven gear 31 in an array 39 of driven gears 31, 32, 33, and 34 on a counter shaft 8 normally meshing with a first speed drive gear 14 in an array 20A of odd-speed shift position drive gears 14, 15, 16, and 17 on an odd-speed shift position drive shaft 6.