A work vehicle, comprising: a load carrying bed including a floor panel, a pair of left and right side panels, a rear gate supported to be openable and closable, and a locking mechanism for maintaining the rear gate under a closing posture of the rear gate; the locking mechanism including left and right locking members configured to maintain the rear gate under the closing posture by engaging locking engagement portions formed in the left and right side panels, a single handle disposed at an intermediate position in a left/right direction of the rear gate and supported to be pivotable about a horizontally oriented operational axis, and left and right operational wires for operating the left and right locking members in a direction for pulling the locking members out of the locking engagement portions by an operation of the handle about the operational axis, characterized in that: each of the left operational wire and the right operational wire is constituted of an inner wire formed of a metal cable and a tubular outer wire slidably accommodating the inner wire, inner end rings being connected to inner end sides of the inner wires, outer end rings being connected to outer end sides of the inner wires; the handle includes a manually operable handle body, a pair of left and right supporting portions formed coaxial with the operational axis relative to positions continuous from opposed ends of the handle body, and a pair of left and right operational portions formed at positions continuous from the pair of supporting portions; the left locking member and the left operational portion, which is on a left side of the handle, are operably coupled to each other via the inner wire of the left operational wire; and the right locking member and the right operational portion, which is on a right side of the handle, are operably coupled to each other via the inner wire of the right operational wire. a load carrying bed including a floor panel, a pair of left and right side panels, a rear gate supported to be openable and closable, and a locking mechanism for maintaining the rear gate under a closing posture of the rear gate; the locking mechanism including left and right locking members configured to maintain the rear gate under the closing posture by engaging locking engagement portions formed in the left and right side panels, a single handle disposed at an intermediate position in a left/right direction of the rear gate and supported to be pivotable about a horizontally oriented operational axis, and left and right operational wires for operating the left and right locking members in a direction for pulling the locking members out of the locking engagement portions by an operation of the handle about the operational axis, characterized in that: each of the left operational wire and the right operational wire is constituted of an inner wire formed of a metal cable and a tubular outer wire slidably accommodating the inner wire, inner end rings being connected to inner end sides of the inner wires, outer end rings being connected to outer end sides of the inner wires; the handle includes a manually operable handle body, a pair of left and right supporting portions formed coaxial with the operational axis relative to positions continuous from opposed ends of the handle body, and a pair of left and right operational portions formed at positions continuous from the pair of supporting portions; the left locking member and the left operational portion, which is on a left side of the handle, are operably coupled to each other via the inner wire of the left operational wire; and the right locking member and the right operational portion, which is on a right side of the handle, are operably coupled to each other via the inner wire of the right operational wire. each of the left operational wire and the right operational wire is constituted of an inner wire formed of a metal cable and a tubular outer wire slidably accommodating the inner wire, inner end rings being connected to inner end sides of the inner wires, outer end rings being connected to outer end sides of the inner wires; the handle includes a manually operable handle body, a pair of left and right supporting portions formed coaxial with the operational axis relative to positions continuous from opposed ends of the handle body, and a pair of left and right operational portions formed at positions continuous from the pair of supporting portions; the left locking member and the left operational portion, which is on a left side of the handle, are operably coupled to each other via the inner wire of the left operational wire; and the right locking member and the right operational portion, which is on a right side of the handle, are operably coupled to each other via the inner wire of the right operational wire.