Background: The use of stainless steel hand files and H and K-files were the conventional shaping method. The present study was conducted to assess cyclic fatigue resistance of reciprocating files systems. Materials & Methods: The present study was conducted in the department of Endodontics. Wave One Gold files (Group I) size 25 taper 0.07 and Reciproc files (Group II) size 25 taper 0.04 were used. The files were tested in artificial 600 curved canals on machined metal block. The time required to fracture the file was recorded in both files systems. Results: In group I, wave one gold files (Group I) size 25 taper 0.07 and in group II, Reciproc files (Group II) size 25 taper 0.04 were used. The time for fracture of wave one gold files file system was 76.3 seconds and for Reciproc file system was 120.4 seconds. The difference was significant (p< 0.05). Conclusion: Authors found that Reciproc is more resistant to cyclic fatigue than Wave One. The time required by Reciproc file system to fracture is more compared to Wave one. Key words: Reciproc, file system, Wave One.