A sodium salt, magnesium salt, lithium salt,potassium salt, calcium salt or barium salt of (R)-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole, and apharmaceutical composition comprising the salt. The novelsalt is useful as an excellent antiulcer agent.