A working vehicle including an engine hood configured to be openable and closable with respect to a machine body, and a driving unit behind the engine hood , comprising: a lock mechanism configured to lock the engine hood ; an operation unit configured to unlock the lock mechanism ; and a dynamic force transmission member configured to transmit operation of the operation unit to the lock mechanism , between the lock mechanism and the operation unit , wherein the lock mechanism is disposed in the engine hood , on one side of the front-rear direction of the machine body, and the operation unit is in the driving unit , and characterized in that the working vehicle further comprises: a dashboard on a front side of the driving unit ; and brake pedal devices (110; 210; 310) below the dashboard , which devices are configured to activate and deactivate braking devices, wherein the operation unit is in an operable state, when the braking devices are operated, and a parking brake is active, and the operation unit is in an inoperable state when the parking brake is inactive, and the brake pedal devices (210; 310) each includes an arm which extends below the dashboard , and rotates with respect to the machine body, and the operation unit is attached to the arm ; when the parking brake is inactive, the operation unit is close to the dashboard and an operation area for the operation unit is vanished; and when the parking brake is active, the operation unit is apart from the dashboard so that the operation area for the operation unit is ensured. a lock mechanism configured to lock the engine hood ; an operation unit configured to unlock the lock mechanism ; and a dynamic force transmission member configured to transmit operation of the operation unit to the lock mechanism , between the lock mechanism and the operation unit , wherein the lock mechanism is disposed in the engine hood , on one side of the front-rear direction of the machine body, and the operation unit is in the driving unit , and characterized in that the working vehicle further comprises: a dashboard on a front side of the driving unit ; and brake pedal devices (110; 210; 310) below the dashboard , which devices are configured to activate and deactivate braking devices, wherein the operation unit is in an operable state, when the braking devices are operated, and a parking brake is active, and the operation unit is in an inoperable state when the parking brake is inactive, and the brake pedal devices (210; 310) each includes an arm which extends below the dashboard , and rotates with respect to the machine body, and the operation unit is attached to the arm ; when the parking brake is inactive, the operation unit is close to the dashboard and an operation area for the operation unit is vanished; and when the parking brake is active, the operation unit is apart from the dashboard so that the operation area for the operation unit is ensured. a dashboard on a front side of the driving unit ; and brake pedal devices (110; 210; 310) below the dashboard , which devices are configured to activate and deactivate braking devices, wherein the operation unit is in an operable state, when the braking devices are operated, and a parking brake is active, and the operation unit is in an inoperable state when the parking brake is inactive, and the brake pedal devices (210; 310) each includes an arm which extends below the dashboard , and rotates with respect to the machine body, and the operation unit is attached to the arm ; when the parking brake is inactive, the operation unit is close to the dashboard and an operation area for the operation unit is vanished; and when the parking brake is active, the operation unit is apart from the dashboard so that the operation area for the operation unit is ensured. <EOS>