PROBLEM TO BE SOLVED: To obtain farm field information of a working farm field as much as possible without a need for operation.SOLUTION: A working machine is provided with working state input means, a GPS receiver, a control device, and a display device. The control device has a farm field database of farm field information including positions of a plurality of farm fields that need to be worked on and a map database of map information of a region including the plurality of farm fields. When receiving an input of a work start signal from the working state input means, the control device performs detection of a traveling position of the working machine multiple times based on received data by the GPS receiver, determines one farm field as a working farm field among the plurality of farm fields included in the map database by using the plurality of traveling positions, and obtains the farm field information of the working farm field from the farm field database.COPYRIGHT: (C)2015,JPO&INPIT【課題】可及的に操作フリーで作業圃場の圃場情報の入手を可能とする。【解決手段】作業機には、作業状態入力手段とGPS受信装置と制御装置と表示装置とが設けられる。制御装置は、作業すべき複数の圃場の位置を含む圃場情報に関する圃場データベースと前記複数の圃場を含む地域の地図情報に関する地図データベースとを有し、前記作業状態入力手段から作業開始信号を入力すると、前記GPS受信装置による受信データに基づく前記作業機の走行位置の検出を複数回行い、前記複数の走行位置を用いて前記地図データベースに含まれる複数の圃場の中から一の圃場を作業中の作業圃場として特定し、前記圃場データベースから前記作業圃場の圃場情報を入手する。【選択図】図5
