A rod fixing apparatus (17) for a vertebra connecting member (7) connecting separated vertebras, the rod fixing apparatus comprising a pressure fixing device (13) for pressure fixing a rod portion (7R) to a rod engagement portion (23) engaging with the rod portion, a bottom member (25) having the rod engagement portion, and structured such that the rod engagement portion is provided in an upper portion of a tubular engagement and protruding portion (27) having a hollow hole (27H), and a screw portion (3) which is configured to be screwed into a vertebra body. Protruding portions (29) are configured to eat into the rod portion in both end portions of the rod engagement portion outside the pressure fixing device, and the screw portion includes a globular head portion configured to be engaged with the hollow hole.
