An extender is removed from a spinal implant without using a separate device, and the loss of materials to be discarded is reduced. A head part 22 of a spinal implant 2 includes a base part 24, which is provided as a portion on a screw part 21 side, and a pair of tab parts 25, which extend from the base part 24 to an opposite side to the screw part 21 side. The pair of tab parts 25 have a tab part-side engagement part 31 to be engaged by an extender-side engagement part that is formed on the extender that is to be attached to the pair of tab parts 25 to guide a fixing rod to a slit 23. A weak part 26 is formed between the base part 24 and the pair of tab parts 25, the weak part 26 being configured to be broken by an external force from the extender engaged with the pair of tab parts 25 and separate the pair of tab parts 25 from the base part 24.
