PROBLEM TO BE SOLVED: To provide an electric tiller in which reduction of the battery capacity of a secondary battery can be easily grasped by an operator.SOLUTION: There is no possibility of power source failure and the like in the middle of tilling work, as the residual capacity of a battery 48 is easily observed by bringing a display unit 26 to display a red color indicating that the electric capacity has been reduced when detecting that the difference of the voltages is less than a predetermined value and passing a predetermined time, by comparing the voltage of the battery 48 for feeding the electric power to an electric motor 8 for driving a rotary unit R for tilling a farm field, with a predetermined standard voltage.COPYRIGHT: (C)2012,JPO&INPIT【課題】二次電池の電池容量が低下したこを作業者が容易に把握できる電動耕耘機を提供すること。【解決手段】圃場を耕耘するロータリ部Rを駆動する電動モータ8に電力を供給するバッテリ48の電圧が予め設定されている基準電圧と比較して、両電圧の差が所定値未満であると、それから所定時間継続したら電気容量が低下したことを表示部26に赤色表示させることでバッテリ48の残量容量が容易に分かるので、耕耘作業途中で電源切れ等が発生するおそれがない。【選択図】図14