To provide a work vehicle for solving problems for example, for turning operation, an operator has to ride on a work vehicle.SOLUTION: There is provided a robot sulky rice transplanter 1 comprising: a planting device 50 coupled to a travel vehicle body 2, and can perform prescribed work to a farm field； a position information acquisition device 300 for acquiring position information of the travel vehicle body； and a control part 400 for, based on the position information acquired by the position information acquisition device 300 and travel path information acquired by using shape information of the farm field, causing the travel vehicle body to automatically perform travel including turning. When manual travel is performed along at least three sides of the farm field, the control part 400 determines shape information of the farm field on the basis of acquired position information of four corners, after acquiring a travel locus and position information of four corners on the farm field, based on the position information acquired by the position information acquisition device 300, the control part 400 does not cause the travel vehicle body to perform automatic travel, when the travel locus is deviated by a predetermined deviation determination reference value or larger value, with a prescribed line forming the shape information of the farm field as a reference.SELECTED DRAWING: Figure 3【課題】旋回操作のために作業車両への作業者の乗車は必須である。 【解決手段】走行車体２に連結され、圃場に対し所定の作業が可能な植付装置５０と、走行車体の位置情報を取得する位置情報取得装置３００と、位置情報取得装置３００により取得された位置情報と、圃場の形状情報を利用して得られた走行経路情報とに基づいて、旋回を含む走行を走行車体に自動で行わせる制御部４００と、を備え、圃場の少なくとも三方に沿って手動走行させられた際、制御部４００は、位置情報取得装置３００により取得された位置情報に基づいて、走行軌跡と圃場の四隅の位置情報とを取得し、取得された四隅の位置情報に基づいて、圃場の形状情報を決定し、制御部４００は、走行軌跡が、圃場の形状情報を構成する所定の線を基準として、予め定められたズレ判定基準値以上ずれていると判定した場合、走行車体に自動走行を行わせない、ロボット乗用田植機１。【選択図】図３
