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 8
