The present invention provides : a novel benzazepine compound which is represented by formula (1) and has vasopressin V1a and V2 antagonism, or a salt thereof; and a pharmaceutical use thereof. [In formula, R1 represents optionally substituted C1-6 alkyl and the like; L represents -C(═O)-NH- and the like; ring A1 represents a hydrocarbon ring and the like; ring A2, represents a hydrocarbon ring and the like; the rings A1 and A2 each may have at least one substituent.]