Transmission device and method of controlling transmission device

A transmission device, which is able to switch a mode between a manual mode in which a clutch device is connected and disconnected according to an operation on a clutch operating element and an automated mode in which the clutch device is connected and disconnected without any operation on the clutch operating element, the transmission device comprising:

• a mode changeover switch on which a mode changeover operation between the manual mode and the automated mode is externally performed;
• other operation unit on which a predetermined shift operation is externally performed separately from the mode changeover switch;
• and
• a control unit configured to control a mode changeover between the manual mode and the automated mode,
• wherein the control unit executes the mode changeover between the manual mode and the automated mode on the basis of the mode changeover operation on the mode changeover switch,
• wherein, when the shift operation has been performed on the other operation unit, the control unit executes the mode changeover between the manual mode and the automated mode,
• wherein the other operation unit comprises a shift operating element configured to perform an operation on a transmission, and
• wherein, when there is no operation on the clutch operating element and the operation is performed on the shift operating element in a state in which the mode is set to the manual mode, the control unit executes a changeover from the manual mode to the automated mode.