It is an object of the invention to provide a new push bar type of index apparatus which can hold and machine the work exactly while the machining center machines the work having a predetermined length even if the work is long. An index apparatus comprises first and second index tables 4a and 4b configured to hold a work 1. The apparatus comprises a push bar transmission mechanism configured to rotate the first index table 4a in response to the movement of the push bar 7. The work 1 and the second index table 4b are rotated by the rotation of the first index table 4a integrally so as to index the work 1.