PROBLEM TO BE SOLVED: To provide a work vehicle capable of attaching an auxiliary wheel, when a traveling wheel is front/back inverted.SOLUTION: A work vehicle 1 includes a shaft part 14 extending in a longitudinal direction of a traveling vehicle body 2, to which driving force is transferred, a traveling wheel 11 attachable to the shaft part 14 by being front/back inverted by an attachment part 115 extending in the longitudinal direction, an extension part 13 having a housing part 132 capable of housing the attachment part 115, attached to a flange part 116 of the traveling wheel 11 regardless of an attachment direction of the traveling wheel 11, and extending in the longitudinal direction, and an auxiliary wheel 12 attached to the tip of the extension part 13.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2018,JPO&INPIT【課題】走行車輪を表裏反転させた場合に補助車輪を取り付けることができる作業車両を提供する。【解決手段】作業車両1は、走行車体2の左右方向に延設され、駆動力が伝達されるシャフト部14と、左右方向に延設された取付部115によって、表裏反転させてシャフト部14に取り付け可能な走行車輪11と、取付部115を収容可能な収容部132を有し、走行車輪11の取付方向に関わらず走行車輪11のフランジ部116に取り付けられ、左右方向に延設された延長部13と、延長部13の先端に取り付けられた補助車輪12とを備える。【選択図】図7