PROBLEM TO BE SOLVED: To obtain a wide space above the floor surface of the floor of an operating unit in a combine.SOLUTION: An upper part of a pedal support arm (50) of a parking brake is fixed to a rotation shaft (60) supported by a vertical frame. A pedal (51) provided at a lower part of the pedal support arm (50) is disposed higher than the floor panel (34) of the floor (13) of an operating unit (5). A connection part (57) for operation linkage means for reaching the parking brake is provided at a front part of a rotation arm (55) fixed to the rotation shaft (60). An engaging unit (56) is provided at a rear part of the rotation arm (55). A first long hole (71) in which the rotation shaft (60) is fitted with play is formed in forward and backward directions in the front part of a checking member (70) that moves in conjunction with operation of a transmission lever (14A). A second long hole (72) in forward and backward directions, in which the engaging unit (56) is fitted with play, and a guide groove (73) for entry of the engaging unit (56) into the second long hole (72) are formed in the intermediate, in the forward and backward directions, of the checking member (70).SELECTED DRAWING: Figure 8COPYRIGHT: (C)2020,JPO&INPIT【課題】コンバインにおける操縦部のフロアの床面上に広い空間を確保すること。【解決手段】駐車ブレーキのペダル支持アーム（５０）の上部を縦フレームに支持された回動軸（６０）に固定し、ペダル支持アーム（５０）の下部に備えたペダル（５１）を、操縦部（５）におけるフロア（１３）の床板（３４）よりも上側に配置し、回動軸（６０）に固定した回動アーム（５５）の前部に駐車ブレーキに至る操作連携手段の接続部（５７）を設け、回動アーム（５５）の後部には係合部（５６）を設け、変速レバー（１４Ａ）の操作に連動して移動する牽制部材（７０）の前部に、回動軸（６０）を遊嵌する前後方向の第１長穴（７１）を形成し、牽制部材（７０）の前後方向の中間部には、係合部（５６）を遊嵌する前後方向の第２長穴（７２）と、係合部（５６）を第２長穴（７２）に侵入させる案内溝（７３）を形成する。【選択図】図８
