Vehicle transmission device

A vehicle transmission device which transmits a driving force of a crankshaft from a first transmission to a drive wheel side through a second transmission, wherein:

• the first transmission comprises a first input shaft to which the driving force from the crankshaft is transmitted, and a first output shaft to which the driving force of the first input shaft is transmitted through one of first transmission gears;
• the second transmission comprises a second input shaft to which the driving force of the first output shaft is transmitted through a transmission mechanism, and a second output shaft to which the driving force of the second input shaft is transmitted through one of second transmission gears and which transmits the driving force to the drive wheel side;
• the first and second transmissions are disposed side by side in a front/rear direction and each of the first and second transmissions is set to have a plurality of gear shift stages;
• the first and second transmissions are provided with slide dogs respectively, and the slide dogs are selectively connected to one of the first transmission gears and one of the second transmission gears so that the driving force can be transmitted by the connected first and second transmission gears;
• and
• a single shift mechanism is provided in a position adjacent to the first and second transmissions, and the shift mechanism is provided to be able to simultaneously shift the first and second transmission gears which transmit the driving force.