PROBLEM TO BE SOLVED: To provide a liquid softener composition suppressing growth of M.osloensis which is a major generation bacterium of 4-methyl-3-hexenoic acid (4M3H) which is one of malodorous components and adding antibacterial and deodorization effect to clothing.SOLUTION: There is provided a liquid softener composition containing (a) three kinds of specific quaternary ammonium salts containing an ester bond (COO), (b) a specific quaternary ammonium salt, (c) one or more kind selected from calcium and magnesium and water with a specific condition.SELECTED DRAWING: None