The sum is part of a 443-million-dollar soft loan pledged by the IDB to help Indonesia rebuild stricken areas, a statement said.
IDB president Ahmad Mohammed Ali signed three agreements in Jakarta to build a school for orphans and to finance the construction and furnishing of a university, it said.
Indonesia was worst hit by the December 26 tragedy which devastated 12 Indian Ocean countries leaving more than 273,000 people dead or missing, including 220,416 in Indonesia.