This invention provides cyclicamino-phenyl sulfamate derivatives represented by a formula ##STR00001## wherein each of R.sup.1 and R.sup.2 stands for hydrogen or lower alkyl; each of R.sup.3 and R.sup.4 stands for hydrogen, halogen, cyano or the like; A stands for nitrogen or CH; B stands for CH.sub.2, SO.sub.2, CO, optionally substituted phenyl or the like; and R.sup.5 stands for alkyl, phenyl, amino or the like, or salts thereof which exhibit excellent steroid sulfatase inhibitory activity and are useful for prevention or treatment of diseases associated with steroids such as estrogen, androgen and the like.