To solve a problem of a conventional traveling vehicle having the difficulty of increasing the capacity of a front drive hydraulic clutch for the prevention of deterioration of transmitting efficiency of braking force from a rear wheel transmission system to front wheels because the conventional traveling vehicle transmits the braking force of a rear wheel parking brake system to the front wheels by engaging the front drive hydraulic clutch, using energization force of an energizing member.

A clutch member 15 for the rear wheel parking brake 15 capable of switching a connection condition between a front wheel transmitting shaft 3 and an output shaft 1 as a rear wheel driving system is mounted on the front wheel transmitting shaft 3 where power transmission from the output shaft 1 is engaged/disengaged by the front drive hydraulic clutch 9, separately from the front drive hydraulic clutch 9 to interlock the clutch member 15 for rear wheel parking brake with the rear wheel parking brake mechanism 6.