To provide a separator structure that intercept heat conduction from an external wall surface to an internal wall surface regarding the separator structure embedded and left in a reinforced concrete structure.

The separator structure is formed by joining a shaft rod 2 provided with one form fixed part 10 at one end, and an anchor bracket 3 provided with the other form fixed part 11 at the other end, to each other at a joint part of the anchor bracket 3. A heat insulating part 12 for joining the shaft rod 2 and the anchor bracket 3 while isolating them in heat conduction is disposed at the joint part. The heat insulating part 12 comprises: a metal nut 6 of horizontally projecting shape, funnel-shaped synthetic resin case 5 in which the nut 6 is embedded; and a synthetic resin cap 7 sealing the nut 6 embedded in the case 5. The nut 6 is entirely enclosed in synthetic resin, opening only a threaded hole 6a.