PROBLEM TO BE SOLVED: To provide a forestry machine which is excellent in fuel consumption.SOLUTION: The forestry machine includes: an engine a control unit which controls the engine a hydraulic pump in which hydraulic oil is discharged by the power of the engine and a roller harvester device including a feeding roller that is driven by the hydraulic oil discharged from the hydraulic pump and performs the feeding operation of a raw wood. The engine rotates at a predetermined rotation frequency when the feeding operation is performed. The control unit accelerates the engine to the predetermined rotation frequency and increases the flow rate of the hydraulic oil discharged from the hydraulic pump, when the control unit detects that the rotation frequency of the engine is lower than the predetermined rotation frequency, the flow rate of the hydraulic oil discharged from the hydraulic pump is low, and the feeding operation has been performed.COPYRIGHT: (C)2015,JPO&INPIT【課題】燃費に優れる林業機械を提供すること。【解決手段】エンジンと、該エンジンを制御する制御部と、前記エンジンの動力により作動油を吐出する油圧ポンプと、該油圧ポンプから吐出する作動油により駆動し、原木の送り操作を行う送材ローラを含むローラハーベスタ装置と、を備え、前記エンジンは、前記送り操作が行われているときに所定の回転数で回転し、前記制御部は、前記エンジンの回転数が前記所定の回転数よりも低く前記油圧ポンプから吐出される作動油の流量が少ない、且つ、前記送り操作が行われたことを検知したときに、前記エンジンを前記所定の回転数に増速させ、前記油圧ポンプから吐出される作動油の流量を増大させる。【選択図】図3
