A working vehicle, comprising: - a travelable vehicle body; - a positioning device configured to detect a position of the vehicle body based on a signal transmitted from a positioning satellite; - a controller configured or programmed to perform an automatic steering control in which steering of the vehicle body is automatically controlled based on detection information detected by the positioning device; - a restraining section configured to restrain the automatic steering control; and - a support bracket that supports the positioning device; wherein - the positioning device is supported by the support bracket so as to allow the positioning device to be shifted between a first position where the positioning device is used and a second position lower than the first position, - the restraining section restrains the automatic steering control when the positioning device is in the second position, - the support bracket comprises a pivotal shaft and a mounting stay rotatable around the pivotal shaft, the mounting stay being configured to have the positioning device mounted thereon, characterized in that - the mounting stay is made of a plate that reflects the signal transmitted from the positioning satellite, - the mounting stay is disposed below the positioning device when the positioning device is in the first position, and - when the positioning device is rotated from the first position together with the mounting stay around the pivotal shaft, the positioning device is moved to the second position and the mounting stay is positioned above the positioning device in the second position and covers over the positioning device so as to restrain the automatic steering control and thus serves as the restraining section. - a travelable vehicle body; - a positioning device configured to detect a position of the vehicle body based on a signal transmitted from a positioning satellite; - a controller configured or programmed to perform an automatic steering control in which steering of the vehicle body is automatically controlled based on detection information detected by the positioning device; - a restraining section configured to restrain the automatic steering control; and - a support bracket that supports the positioning device; - the positioning device is supported by the support bracket so as to allow the positioning device to be shifted between a first position where the positioning device is used and a second position lower than the first position, - the restraining section restrains the automatic steering control when the positioning device is in the second position, - the support bracket comprises a pivotal shaft and a mounting stay rotatable around the pivotal shaft, the mounting stay being configured to have the positioning device mounted thereon, characterized in that - the mounting stay is made of a plate that reflects the signal transmitted from the positioning satellite, - the mounting stay is disposed below the positioning device when the positioning device is in the first position, and - when the positioning device is rotated from the first position together with the mounting stay around the pivotal shaft, the positioning device is moved to the second position and the mounting stay is positioned above the positioning device in the second position and covers over the positioning device so as to restrain the automatic steering control and thus serves as the restraining section.