In 1955 Swyer(l) described two cases of sex reversal that differed from known forms of what was then termed 'Male pseudohermaphroditism".The two females had female phenotype and male karyotype (46 XY). Incidence of Swyer Syndrome is 1 in 80,000. (2) We here report a case of Swyer syndrome presented in our hospital. An eighteen year old lady presented on first March 2008 with history of primary amenorrhea and hence primary infertility since 2 years of her marriage . On examination her vitals were normal. Her weight was 48 kg and height 5 feet.She had underdeveloped breasts (Tanner 2)and male type chest.