To provide a linking structure which can facilitate replacement of an attachment to be attached to a member of an earth-moving machine.

An attachment installing pin bearing portion 7 of a member of an earth-moving machine is constituted of a fixed split bearing member 7a which is integrally formed with or detachably secured to the member, and a mobile split bearing member 7b which opposedly abuts with the fixed split bearing member 7a to form a bearing. Further, fixing means 8 is provided to pinch an attachment installing pin 10 between opposite circular are bearing faces 9a, 9b of both opposite split bearing members, to thereby join the mobile split bearing member 7b with the secured split bearing member 7a.