A twin-clutch manual transmission including: first and second input shafts provided with respective clutches; a counter shaft parallel to these input shafts; gear sets of an odd-numbered gear range group disposed between the rear end portion of the first input shaft and the counter shaft; gear sets of the even-numbered gear range group disposed between the second input shaft and the counter shaft; an output shaft being concentric with and abutting on a rear end of the first input shaft; and a synchronizer provided between the rear end of the first input shaft and the output shaft to provide a direct-coupling gear range. The odd-numbered gear range group includes the direct-coupling gear range.