Abstract: A benzoxazepine derivative having the general formula (I) and its salts and medicaments containing the same as effective ingredients: wherein, n is an integer of 2 to 5, R1 indicates a hydrogen atom, halogen atom, C1 to C4 lower alkyl group, C1 to C4 lower alkoxyalkyl group, C1 to C4 halogenoalkyl group, cyano group, or ester group, R2 indicates a hydrogen atom, halogen atom, C1 to C4 lower alkyl group, C1 to C4 lower alkoxy group, or hydroxy group, a dotted line indicates the presence or absence of a binding bond, W indicates C, CH, or CH2 or a nitrogen atom, provided that, when W is a nitrogen atom, Z is bonded to W and the dotted line indicates the absence of a bond, and Z indicates an unsubstituted or substituted aromatic hydrocarbon ring group or an unsubstituted or substituted heterocyclic group).