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.