To provide a rotary vertebra fixing apparatus which is easily operated and improves stability thereof.

A base part 10 of the rotary vertebra fixing apparatus has a U-shaped slot 12 for housing a fixing rod 30 or a fastening member and groove parts 14 formed on both the sides of the inner wall of the U-shaped slot 12, a fixing block 20 of the rotary vertebra fixing apparatus has a flange part 22 provided around the bottom, tangential faces 220 provided on both the sides of the flange 22, an arcuate press face provided on the bottom, and a rotary part 26 provided on the upper part.