PROBLEM TO BE SOLVED: To reduce the occupied area of an endless turning cutting blade and to improve the function of the endless turning cutting blade, though a device adopts the endless turning cutting blade.SOLUTION: A reaping device has a constitution that the forward and the backward strokes of the endless turning cutting blade constituted by attaching a large number of blade bodies 35 to an endless turning body 34, are provided with areas in which the movement trajectory of the blade bodies 35 are duplicated in a plane view and cutting actions are produced by the blade bodies 35 mutually moving in reverse directions in both strokes.COPYRIGHT: (C)2008,JPO&INPIT【課題】 無端回動刈刃を採用するものでありながら、その占有面積を低減するとともに、無端回動刈刃の機能向上を図る。【解決手段】 無端回動体34に多数の刃体35を装着して構成される無端回動刈刃の往行程経路と復行程経路とに、平面視で刃体35の移動軌跡が重複する領域を設定して、両行程で互いに逆方向へ移動する刃体35によって切断作用が生じるように構成してある。【選択図】図3