To obtain the subject composition excellent in antimicrobial and antifungal properties and further antistatic properties and water, detergent and weather resistances, etc., by including a specific compound, a specified ammonium salt and an organic compound-based antifungal agent.

This composition is obtained by including (A) an ester compound having an ether structure in the molecule, (B) an ammonium salt represented by the formula (any one of R1 to R3 is a 5-24C alkyl and the others are each a 1-5C alkyl; R4 is a 2-4C alkylene; n is 1-15; X is an anion of hydrochloric acid, chloric acid or perchloric acid) as an antimicrobial agent and (C) an organic compound-based antifungal agent. The ingredient A is prepared by carrying out an esterifying reaction of (i) a polyfunctional carboxylic acid with (ii) a monoalkyl ether of glycols. A dichlofluanid-N-haloalkylthio-based compound, a phenol ether derivative, an imidazole derivative, a sulfonyl derivative, etc., are cited as the ingredient C.