A work vehicle comprising: a traveling device ; a driving device which drives the traveling device; a pivot operation type operating lever which performs speed change operation of the driving device; a rotary type potentiometer which detects an operation position of the operating lever; a controlling means which operates speed change of the driving device based on a detection result of the potentiometer; and an interlocking mechanism which interlocks the operating lever with a rotary operation shaft of the potentiometer; wherein a pivot axis (P1) of the operating lever and a rotary axis (P2) of the rotary operation shaft are located on a same axis, and wherein the interlocking mechanism includes: an input part which pivots following the operating lever about the pivot axis of the operating lever as a pivot, and inputs power of the operating lever, an output part which is supported to the rotary operation shaft of the potentiometer and outputs power of the input part to the rotary operation shaft, and a connecting pin which operably connects the input part and the output part with each other, wherein the vehicle further comprises a damper which is connected to the input part and which acts on the operating lever , the damper being connected to/between the free end side part of the input part , and a part of the vehicle body frame located on the rear side relative to a part of the vehicle body frame supporting the operating lever . a traveling device ; a driving device which drives the traveling device; a pivot operation type operating lever which performs speed change operation of the driving device; a rotary type potentiometer which detects an operation position of the operating lever; a controlling means which operates speed change of the driving device based on a detection result of the potentiometer; and an interlocking mechanism which interlocks the operating lever with a rotary operation shaft of the potentiometer; wherein a pivot axis (P1) of the operating lever and a rotary axis (P2) of the rotary operation shaft are located on a same axis, and wherein the interlocking mechanism includes: an input part which pivots following the operating lever about the pivot axis of the operating lever as a pivot, and inputs power of the operating lever, an output part which is supported to the rotary operation shaft of the potentiometer and outputs power of the input part to the rotary operation shaft, and a connecting pin which operably connects the input part and the output part with each other, an input part which pivots following the operating lever about the pivot axis of the operating lever as a pivot, and inputs power of the operating lever, an output part which is supported to the rotary operation shaft of the potentiometer and outputs power of the input part to the rotary operation shaft, and a connecting pin which operably connects the input part and the output part with each other, wherein the vehicle further comprises a damper which is connected to the input part and which acts on the operating lever , the damper being connected to/between the free end side part of the input part , and a part of the vehicle body frame located on the rear side relative to a part of the vehicle body frame supporting the operating lever . <EOS>