A work vehicle having, as driving modes, at least two modes of an automatic driving mode in which the work vehicle autonomously travels without depending on driving operation by a riding person and a manual driving mode in which the work vehicle travels by driving operation by the riding person, in the automatic driving mode, a manned automatic driving mode in which the work vehicle autonomously travels in a state in which the riding person is present in the work vehicle and an unmanned automatic driving mode in which the work vehicle autonomously travels in a state in which the riding person is absent in the work vehicle being included, the work vehicle comprising: an override operation sensor (34, 51, 52, 53) that senses override operation to carry out switching between the automatic driving mode and the manual driving mode; a selection device (59a, 59b) for selecting any one of driving modes in the manual driving mode, the manned automatic driving mode, and the unmanned automatic driving mode as the driving mode; and a controller that controls the work vehicle on a basis of the driving mode selected by the selection device (59a, 59b), the controller being configured to carry out switching from the manned automatic driving mode to the manual driving mode when override operation is sensed by the override operation sensor (34, 51, 52, 53) in a case in which the manned automatic driving mode is selected by the selection device (59a, 59b), characterized in that, the controller is configured to continue the unmanned automatic driving mode without switching to the manual driving mode when override operation is sensed by the override operation sensor in a case in which the unmanned automatic driving mode is selected by the selection device. in the automatic driving mode, a manned automatic driving mode in which the work vehicle autonomously travels in a state in which the riding person is present in the work vehicle and an unmanned automatic driving mode in which the work vehicle autonomously travels in a state in which the riding person is absent in the work vehicle being included, the work vehicle comprising: an override operation sensor (34, 51, 52, 53) that senses override operation to carry out switching between the automatic driving mode and the manual driving mode; a selection device (59a, 59b) for selecting any one of driving modes in the manual driving mode, the manned automatic driving mode, and the unmanned automatic driving mode as the driving mode; and a controller that controls the work vehicle on a basis of the driving mode selected by the selection device (59a, 59b), an override operation sensor (34, 51, 52, 53) that senses override operation to carry out switching between the automatic driving mode and the manual driving mode; a selection device (59a, 59b) for selecting any one of driving modes in the manual driving mode, the manned automatic driving mode, and the unmanned automatic driving mode as the driving mode; and a controller that controls the work vehicle on a basis of the driving mode selected by the selection device (59a, 59b), the controller being configured to carry out switching from the manned automatic driving mode to the manual driving mode when override operation is sensed by the override operation sensor (34, 51, 52, 53) in a case in which the manned automatic driving mode is selected by the selection device (59a, 59b), characterized in that, the controller is configured to continue the unmanned automatic driving mode without switching to the manual driving mode when override operation is sensed by the override operation sensor in a case in which the unmanned automatic driving mode is selected by the selection device. carry out switching from the manned automatic driving mode to the manual driving mode when override operation is sensed by the override operation sensor (34, 51, 52, 53) in a case in which the manned automatic driving mode is selected by the selection device (59a, 59b), characterized in that, the controller is configured to continue the unmanned automatic driving mode without switching to the manual driving mode when override operation is sensed by the override operation sensor in a case in which the unmanned automatic driving mode is selected by the selection device.