Abstract: The present invention aims to minimize the axial and radial clearance or play suppress a radial inertial movement in the pin joint connection portions of a machine operating link device. To achieve this, the present invention provides a joint connecting pin device for machine operating links adapted to change and retain the posture of the working unit of a hydraulic excavator or the like, the device comprising: thrust distributing and forming portions which are provided between end surfaces of pin boss portions on links on one side connected to a pin and opposed end surfaces of a link on the other side and which are adapted to distribute a thrust in the axial and radial directions; rigid-elastic annular members which are held by the thrust distributing and forming portions; and an axial movement device which is provided on at least one of the pin boss sections and which is adapted to impart a radial resilient force to the rigid-elastic annular members.