A multifunction operation tool includes a swing body swingably supported in a front/back direction of a vehicle body and implementing acceleration control on a transmission by swinging in a forward direction and implementing deceleration control on the transmission by swinging in a rearward direction. A grip body arranged on a free end portion of the swing body. A grip part arranged on a first lateral area of the grip body in a transverse direction of the vehicle body and having a convex surface. A vertical lateral surface arranged on a second lateral area of the grip body and which is a lateral surface of the grip part. An operator-facing surface arranged on the second lateral area of the grip body and extending in the transverse direction of the vehicle body from a bottom edge of the vertical lateral surface. Operation switch groups are arranged on the vertical lateral surface and the operator-facing surface.
