An anti-peptic ulcer agent which contains as an active ingredient aminobenzoic acid compounds of the formula <IMAGE> (wherein R1, R2, and R3 which may be the same or different represent a hydrogen atom, halogen atom, lower alkyl group or lower alkoxy group but they do not represent a hydrogen atom at the same time) or pharmaceutically acceptable salts thereof and a method of preventing or treating a human in need of said prevention or treatment an effective amount of said active ingredient are disclosed.
