Low cycle fatigue (LCF) behavior of coarse and fine grained superalloy CM247LC at 760degreesC has been investigated. Both coarse and fine grained CM247LC showed similar cyclic stress response.. however, the fine grained CM247LC specimen exhibited relatively uniform and superior fatigue properties to the coarse grained one. It was found that fatigue crack initiation of the alloy was keen to the applied strain range. Fatigue crack initiated at the surface of the specimen with high strain range (triangleepsilon(t) greater than or equal to 0.7%) while the initiation site moved to the internal defects at low strain range (triangleepsilon(t) less than or equal to 0.6%).