RAPD marker was used to evaluate genetic relationships in a set of 16 inbred lines of sunflower representing the genetic stock, including restorers and maintainer lines, of the classical cytoplasmic male sterility. The genotypes were grouped into eight cluster at 0.83 coefficient level. A total of 164 bands were detected, of which 69.51% were polymorphic among the genotypes tested. The similarity coefficient was maximum between TNAU7 6/8 and EC 68414/1 (0.90) indicating less divergence between them. Lower similarity indices were observed between 62B and GP324 (0.67) and between 852B and GP 324 (0.68), indicating more divergence. Crossing between the genotypes with low similarity coefficient will manifest high heterosis.