Provided are an oxaziridine compound showing an antifungal activity and cytotoxicity and expected as a new antifungal agent or anticancer agent, and a production method thereof.A compound represented by the formula 1: wherein X is a single bond, —C(H)(R6)— or —C(H)(R7)—C(H)(R8)—; and R1-R8 are each independently a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, or a salt thereof.