A detergent composition for metal product, which contains an amine (component A) represented by a general formula (I), a salt (component B′) of a dicarboxylic acid (component B) represented by a general formula (II): HOOC—R.sup.4—COOH (II) and the amine (component A), a salt (component C′) of a monocarboxylic acid (component C) represented by a general formula (III): R.sup.5—COOH (III) and the amine (component A), a nonionic surfactant (component D) represented by a general formula (IV): R.sup.6—O-{(EO)n/(PO)m}-H (IV), and water (component E) and has a pH of more than 7 and 10 or less. The detergent composition for metal product exhibits excellent detergency and metal corrosion suppressing performance.

A detergent composition for metal product, which contains an amine (component A) represented by a general formula (I), a salt (component B) of a dicarboxylic acid (component B) represented by a general formula (II): HOOCR.sup.4COOH (II) and the amine (component A), a salt (component C) of a monocarboxylic acid (component C) represented by a general formula (III): R.sup.5COOH (III) and the amine (component A), a nonionic surfactant (component D) represented by a general formula (IV): R.sup.6O-{(EO)n/(PO)m}-H (IV), and water (component E) and has a pH of more than 7 and 10 or less. The detergent composition for metal product exhibits excellent detergency and metal corrosion suppressing performance.