To improve the operability in controlling the speed by reducing the transmission loss of the operation force by a wire body.

An agricultural working vehicle is provided with an oscillating and rotatable switching lever 4 to be interlocked with an operation input shaft 3 of a transmission, and an operation member 1 to be connected to a middle part in the longitudinal direction of the switching lever 4 through a wire body 2, one end part of a guiding outer cylinder 2a covering a middle part of the wire body 2, is provided at the position across the oscillation range of the switching lever 4, the operation force of the operation member 1 is transmitted to the switching lever 4 through one wire body 2, and the operation input shaft 3 is rotated to control the advancing range and the retreating range.