Benzazepine derivative of fusion and pharmaceutical composition including this derivative.

A benzazepine derivative fused 5-membered aromatic nitrogenous represented by the general formula (I) and is useful as antagonists of vasopressin arginine, a salt thereof, and a pharmaceutical composition that contains as active ingredient in WHERE B represents a 5-membered ring AROMATIC nITROGEN which may be substituted, having at least one nitrogen atom and may further have an oxygen atom or sulfur; R SUP {1} {SUP YR, 2} are each independently hydrogen, halogen, lower alkyl, amino which may be substituted by lower alkyl, or lower alkoxy; A represents a single bond or -NHCO- (CR SUP {3} R {SUP, 4}) {SUB, N} -; N represents an integer from 0 to 3; R SUP {3} {SUP YR, 4} are each, independently, hydrogen or lower alkyl, YR SUP {3} {SUP YR, 4} can be combined to form an alkylene C SUB {2} -C SUB {7}; C denotes a benzene ring optionally substituted.