Epidermoid cysts of ovary are exceptionally rare benign cystic lesions which are exclusively lined by stratified squamous epithelium without any adenexal structures. They are usually an incidental finding on examination of hysterectomy specimens. It is essential to differentiate these cystic lesions from   dermoid cysts and immature teratomas due to different modes of treatment of these entities. Histogenesis of epidermoid cysts is still not clear , however some authors have described the origin of these lesions from epithelial cell nests that are encountered in Brenner tumours, from pluripotent celomic epithelium etc. We herein report a case of an epidermoid cyst in a 46 year female who presented with complaints of increased vaginal bleeding and lower abdominal pain and was operated for adenomyosis, but on histopathological examination ,epidermoid cyst was an incidental finding.