To provide a steel bundle which does not cause dew condensation and allows to visually observe the fitting depth of a threaded bar and manufacturing method therefor.

This steel bundle 10 comprises a bundle height adjusting fittings 10, an upper threaded bar 20, a lower threaded bar 30, a sleeper fittings 40, and a supporting plate 50. The bundle height adjusting fittings 10 has a frame shape and comprises an upper portion 11 having a threaded hole 14, a lower portion 12 having a threaded hole 15, and two parallel intermediate portion 13 extending between the upper portion 11 and the lower portion 12. The bundle height adjusting fittings 10 is produced by heating a law material for bar and splitting and widening the heated bar from the split line in the middle portion.