A laundry detergent or cleaning composition which comprises a copolymer containing sulfonate groups containing from 1 to 50 mass percent of {HEAD ~ structural units} derived from {TAIL ~ 1 or more kinds} of monomers selected from ether bond containing monomers represented by Formulas and , 50 mass % or more and less than 98 mass % of structural units derived from a carboxyl group containing monomer , and 1 mass % or more and less than 50 mass % of structural units de rived from a sulfonate group containing monomer  
derived from
A laundry detergent or cleaning composition which comprises a copolymer containing sulfonate groups containing from 1 to 50 mass percent of { HEAD ~ structural units } derived from { TAIL ~ 1 or more kinds } of monomers selected from ether bond containing monomers represented by Formulas and , 50 mass % or more and less than 98 mass % of structural units derived from a carboxyl group containing monomer , and 1 mass % or more and less than 50 mass % of structural units de rived from a sulfonate group containing monomer
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