FIELD: agriculture.SUBSTANCE: invention relates to a head of timber harvesting machine, which comprises a frame of the head of timber harvesting machine, to be connected with the end of the lifting boom of the machine for work in the forest, a feeding device for moving a tree trunk, a front knife and/or the upper knives for limbing in front of the feeding device, a transverse cutting device for cutting trunks after the feeding device, and the lower knife for limbing between the feeding device and the transverse cutting device mounted on the side of the transverse cutting device on the frame of the head of the timber harvesting machine. In the head of the timber harvesting machine the lower knife for limbing is made with the ability of turning to a position for limbing around the tree trunk and the position of saving space between the outer surface of the tree trunk and the frame of the head of timber harvesting machine in the direction from the path of the tree trunk. In the position of saving space the lower knife for limbing is located between the outer surface of the tree trunk and the frame of the head of timber harvesting machine so that its end points in the direction of the head frame of the timber harvesting machine, at that at least its part extends above the path of the tree trunk. The lower knife for limbing is located after the feeding devices on the head frame in the recess so that it can be rotated in the recess substantially imperceptible from the side of the front knife and the upper knives for limbing. The lower knife for limbing is made with the ability to move by the hydraulic cylinder.EFFECT: implementation provides compactness of the design and ease in operation.5 cl, 4 dwgИзобретение относится к головке лесозаготовительной машины, которая включает в себя раму головки лесозаготовительной машины, подлежащую соединению с концом подъемной стрелы машины для работы в лесу, подающее устройство для перемещения ствола дерева, передний нож и/или верхние
