A multifunction operation tool configured to control a work vehicle with speed changing capability which has an engine, wheels (2a, 2b), and a transmission configured to transmit power of the engine to the wheels (2a, 2b); the multifunction operation tool comprising: a swing body swingably supported at least in a front-back direction of a vehicle body for implementing acceleration control and deceleration control; a grip body arranged on a free end portion of the swing body; a grip part formed on the grip body and having a convex surface and an upright lateral surface, the convex surface being arranged on a first lateral area of the grip body with respect to a lateral direction of the work vehicle, and the upright lateral surface being arranged on a second lateral area of the grip body opposite to the first lateral area with respect to a lateral direction of the work vehicle; an operator-facing surface arranged on the second lateral area of the grip body and extending from an end of the upright lateral surface; and at least one or more operation switches arranged on at least one of the upright lateral surface and the operator-facing surface; characterised in that the at least one or more operation switches include a travel operation switch group that has a shuttle button configured to switch between forward travel and reverse travel, the shuttle button being arranged on the operator-facing surface or the upright lateral surface; the travel operation switch group further includes a shuttle permission switch which enables/disables a function of the shuttle button and is arranged on an opposite lateral surface of the grip body with respect to the upright lateral surface or on the back surface of the grip part; the shuttle button is configured to switch the transmission to forward travel when an upward arrow portion of the shuttle button is pressed along with the shuttle permission switch, and switch the transmission to reverse travel when a downward arrow portion of the shuttle button is pressed along with the shuttle permission switch. a swing body swingably supported at least in a front-back direction of a vehicle body for implementing acceleration control and deceleration control; a grip body arranged on a free end portion of the swing body; a grip part formed on the grip body and having a convex surface and an upright lateral surface, the convex surface being arranged on a first lateral area of the grip body with respect to a lateral direction of the work vehicle, and the upright lateral surface being arranged on a second lateral area of the grip body opposite to the first lateral area with respect to a lateral direction of the work vehicle; the convex surface being arranged on a first lateral area of the grip body with respect to a lateral direction of the work vehicle, and the upright lateral surface being arranged on a second lateral area of the grip body opposite to the first lateral area with respect to a lateral direction of the work vehicle; an operator-facing surface arranged on the second lateral area of the grip body and extending from an end of the upright lateral surface; and at least one or more operation switches arranged on at least one of the upright lateral surface and the operator-facing surface; characterised in that the at least one or more operation switches include a travel operation switch group that has a shuttle button configured to switch between forward travel and reverse travel, the shuttle button being arranged on the operator-facing surface or the upright lateral surface; the travel operation switch group further includes a shuttle permission switch which enables/disables a function of the shuttle button and is arranged on an opposite lateral surface of the grip body with respect to the upright lateral surface or on the back surface of the grip part; the shuttle button is configured to switch the transmission to forward travel when an upward arrow portion of the shuttle button is pressed along with the shuttle permission switch, and switch the transmission to reverse travel when a downward arrow portion of the shuttle button is pressed along with the shuttle permission switch.