A novel method to fabricate an intermetallic compound fiber / metal matrix composite is proposed. Narrow holes are drilled in the metal matrix A, and. then metal fibers B are inserted into these holes. The specimen is heated at elevated temperatures in an argon atmosphere to obtain molten metal B in the holes. Then the reaction of mA + nB --> A(m)B(n) should be caused in the narrow holes. During the reaction, intermetallic compound of A(m)B(n) replaces the metal B maintaining its fiber shape surrounded by the metal matrix A. This fabrication method is named as reaction at narrow holes method (RANH method). In this study, a nickel-aluminides fiber / nickel composite is fabricated by the novel method, RANH method.