A harvester comprises: a left and right pair of tension members for respectively tensioning left and right endless pivoting transport bodies; a left and right pair of pivoting arms for respectively supporting within a feeder case the left and right tension members; and a connection shaft for coordinately connecting the left and right pivoting arms. Adaptive mechanisms 71 for permitting the pivoting arms 33 to move in the axial direction of the connection shaft 50 are provided between the connection shaft 50 and the left and right pivoting arms 33.