[Technical Problems]To enable a rotation motion with a lower risk of making a work land rough by digging the land with a rear wheel on a rotation inner side.[Means of Solving the Problems]A work vehicle 1 includes: a traveling machine body 2 in which an engine 5 is installed； left and right traveling sections 4 that support the traveling machine body 2； a steering operation tool 14 operated for changing a traveling direction of the traveling machine body 2； and left and right main clutch members 48 that engage and disengage power transmission to the left and right traveling sections 4. The main clutch member 48 for the traveling section 4 on a rotation inner side performs a disengagement operation in accordance with a steering operation using the steering operation tool 14. Left and right sub clutch members 111 and a reduction mechanism 131 are provided separately from the left and right main clutch members 48. The sub clutch member 111 for the traveling section 4 on the rotation inner side perform an engagement operation in response to the disengagement operation by the main clutch member 48 for the traveling section 4 on the rotation inner side. Thus, power is transmitted to the traveling section 4 on the rotation inner side via the reduction mechanism 131 or the sub switching member 111 and the reduction mechanism 131, so that the traveling section 4 on the rotation inner side is driven at a lower speed than the traveling section 4 on a rotation outer side.本發明之課題，在於減少於迴轉時地面遭迴轉內側之後車輪挖鑿而使作業地被破壞的情形。本發明之作業車1具備有：移行機體2，其搭載有引擎5；左右之移行部4，其等支撐移行機體2；轉向操作具14，其對移行機體2之行進方向進行變更操作；及左右之主離合構件48，其等將朝向左右之移行部4之動力傳遞加以離合；並根據轉向操作具14之轉向操作使對於迴轉內側之移行部4之主離合構件48進行斷開作動，且該作業車另具備有獨立於左右之主離合構件48之左右之副離合構件111及減速機構131，伴隨著對於迴轉內側之移行部4之主離合構件48之斷開作動，藉由使對於迴轉內側之移行部4之副離合構件111進行連接作動，朝向迴轉內側之移行部4之動力經由減速機構131、或經由副離合構件111及減速機構131，將迴轉內側之移行部4以較迴轉外側之移行部4更低之速度加以驅動。
