PROBLEM TO BE SOLVED: To provide a work vehicle cooperation system which effectively functions in a ground work form in which work traveling and turning traveling are mixed.SOLUTION: A work vehicle cooperation system includes: a master position detection module for detecting a position of a master work vehicle a slave position detection module for detecting a position of an unmanned steering type slave work vehicle a master traveling track calculating portion for calculating a traveling track of the master work vehicle a turning detection portion for detecting the turning traveling of the master work vehicle for shifting from one work traveling in a turning area to the next work traveling a work traveling target calculating portion for calculating a target traveling position at the work traveling of the slave work vehicle on the basis of the work traveling track of the master work vehicle and the position of the slave work vehicle and a turning traveling target calculating portion for calculating a target traveling position at turning traveling on the basis of a turning traveling route of the slave work vehicle calculated on the basis of a turning traveling start position and a turning traveling finish position of the master work vehicle.COPYRIGHT: (C)2014,JPO&INPIT【課題】作業走行と転回走行とが混在する対地作業形態において効果的に機能する作業車協調システム。【解決手段】親作業車の位置を検出する親位置検出モジュールと、無人操縦式の子作業車の位置を検出する子位置検出モジュールと、親作業車の走行軌跡を算定する親走行軌跡算定部と、転回エリアにおける1つの作業走行から次の作業走行へ移行するための親作業車の転回走行を検知する転回検知部と、親作業車の作業走行軌跡と子作業車の位置とに基づいて子作業車の作業走行時の目標走行位置を算定する作業走行目標算定部と、親作業車の転回走行開始位置と転回走行終了位置に基づいて算定された子作業車の転回走行経路に基づいて転回走行時の目標走行位置を算定する転回走行目標算定部が備えられている。【選択図】図1