A work vehicle, comprising: a work vehicle position detection module configured to detect a work vehicle position; a path calculation unit configured to calculate a target running path; an automatic running control unit configured to execute automatic running based on the work vehicle position and the target running path; a manual running operation unit configured to be manually operated; a manual running control unit configured to execute manual running based on an operation signal from the manual running operation unit; characterized in that the work vehicle further comprises: a first control unit configured to execute a change from manual running by the manual running control unit to automatic running by the automatic running control unit, a manual stoppage of the work vehicle being a condition for the change; a second control unit configured to to set a manual driving constraining mode which is a transition state upon switching from automatic driving to manual driving and execute a forced stoppage of the work vehicle, when changing from automatic running by the automatic running control unit to manual running by the manual running control unit; and a third control unit configured to execute a forced stoppage of the work vehicle by setting an automatic driving suspended mode for temporarily suspending automatic running by the automatic running control unit in response to a suspend instruction from the manual running operation unit, and configured to change the automatic driving suspended mode to an automatic driving mode without involving an automatic driving permission mode which is a state awaiting switching from a manual driving mode to the automatic driving mode and resume automatic running by the automatic running control unit in response to a resume instruction from the manual running operation unit. a work vehicle position detection module configured to detect a work vehicle position; a path calculation unit configured to calculate a target running path; an automatic running control unit configured to execute automatic running based on the work vehicle position and the target running path; a manual running operation unit configured to be manually operated; a manual running control unit configured to execute manual running based on an operation signal from the manual running operation unit; characterized in that the work vehicle further comprises: a first control unit configured to execute a change from manual running by the manual running control unit to automatic running by the automatic running control unit, a manual stoppage of the work vehicle being a condition for the change; a second control unit configured to to set a manual driving constraining mode which is a transition state upon switching from automatic driving to manual driving and execute a forced stoppage of the work vehicle, when changing from automatic running by the automatic running control unit to manual running by the manual running control unit; and a third control unit configured to execute a forced stoppage of the work vehicle by setting an automatic driving suspended mode for temporarily suspending automatic running by the automatic running control unit in response to a suspend instruction from the manual running operation unit, and configured to change the automatic driving suspended mode to an automatic driving mode without involving an automatic driving permission mode which is a state awaiting switching from a manual driving mode to the automatic driving mode and resume automatic running by the automatic running control unit in response to a resume instruction from the manual running operation unit. a first control unit configured to execute a change from manual running by the manual running control unit to automatic running by the automatic running control unit, a manual stoppage of the work vehicle being a condition for the change; a second control unit configured to to set a manual driving constraining mode which is a transition state upon switching from automatic driving to manual driving and execute a forced stoppage of the work vehicle, when changing from automatic running by the automatic running control unit to manual running by the manual running control unit; and a third control unit configured to execute a forced stoppage of the work vehicle by setting an automatic driving suspended mode for temporarily suspending automatic running by the automatic running control unit in response to a suspend instruction from the manual running operation unit, and configured to change the automatic driving suspended mode to an automatic driving mode without involving an automatic driving permission mode which is a state awaiting switching from a manual driving mode to the automatic driving mode and resume automatic running by the automatic running control unit in response to a resume instruction from the manual running operation unit.