A work vehicle comprising a console box , wherein: the console box includes a box body turnable between a first posture and a second posture, the second posture being achieved as result of upward movement of the box body from the first posture, a manipulation lever arranged to protrude from the box body , a lock lever arranged to protrude from the box body , the lock lever being configured to be turnable, a biasing member configured to bias the box body in a direction for bringing the box body into the second posture, and a lock cam configured to lock turning of the box body both in the first posture and in the second posture, the lock cam includes a guide member having a cam groove , and a cam arm configured to turn integrally with the lock lever , the cam arm has an insertion portion inserted into the cam groove , characterized in that a helical torsion spring is arranged to connect the cam arm and the guide member , the helical torsion spring being configured to bias the cam arm , during movement of the insertion portion along the cam groove , the cam arm inverts a direction in which the box body is caused to turn by a biasing force of the helical torsion spring , and the helical torsion spring has a coil portion arranged closer to a center in a left-right direction of the box body than is the guide member . the console box includes a box body turnable between a first posture and a second posture, the second posture being achieved as result of upward movement of the box body from the first posture, a manipulation lever arranged to protrude from the box body , a lock lever arranged to protrude from the box body , the lock lever being configured to be turnable, a biasing member configured to bias the box body in a direction for bringing the box body into the second posture, and a lock cam configured to lock turning of the box body both in the first posture and in the second posture, a box body turnable between a first posture and a second posture, the second posture being achieved as result of upward movement of the box body from the first posture, a manipulation lever arranged to protrude from the box body , a lock lever arranged to protrude from the box body , the lock lever being configured to be turnable, a biasing member configured to bias the box body in a direction for bringing the box body into the second posture, and a lock cam configured to lock turning of the box body both in the first posture and in the second posture, the lock cam includes a guide member having a cam groove , and a cam arm configured to turn integrally with the lock lever , a guide member having a cam groove , and a cam arm configured to turn integrally with the lock lever , the cam arm has an insertion portion inserted into the cam groove , characterized in that a helical torsion spring is arranged to connect the cam arm and the guide member , the helical torsion spring being configured to bias the cam arm , during movement of the insertion portion along the cam groove , the cam arm inverts a direction in which the box body is caused to turn by a biasing force of the helical torsion spring , and the helical torsion spring has a coil portion arranged closer to a center in a left-right direction of the box body than is the guide member . <EOS>