The invention relates to a hydraulically controlled head 2 for harvesting trees. The head 2 consists of a clamp 7 which can be placed round a tree and a first hydraulic actuator 12 with which the clamp 7 can be closed and reopened, and of a double - action hydraulic valve 6 with which the head can be connected to a hydraulic pump unit forming part of a vehicle 1 which can position the head 2. According to the invention the head 2 also comprises a tilting device 9 and a saw 13, which can likewise be connected to the double - action hydraulic valve 6.
