We retrospectively studied 125 patients with local breast cancer recurrence treated between 1977 and 1999 at Ohmoto Hospital. Multiple regression equation (the prognostic index) was made of prognostic indicators determined by some analyses. The prognostic index (PI) was 5.550-0.034×patient age at initial surgery-0.682×clinical stage of tnm+0.025×disease-free interval (months)-0.821×recurrence site (site point)+0.853×secondary surgery (No: 0, Yes: 1). The disease-free interval was the most effective factor in this index. The 5-year survival from local recurrence was 100% for Grade I (PI≥4.5), 62.4% for Grade II (2.5%le;PI<4.5), 19.4% for Grade III (2.0≤PI<2.5), and 6.6% for Grade IV (PI<2.0). This classification of the prognostic index had definite prognostic significance.