An actinic ray-sensitive or radiation-sensitive resin composition includes any of the compounds of general formula (I) below;wherein:Ar represents an aromatic ring that may have a substituent other than the -(A-B) groups;n is an integer of 1 or greater;A represents any one, or a combination of two or more members selected from a single bond, an alkylene group, —O—, —S—, —C(═O)—, —S(═O)—, —S(═O)2— and —OS(═O)2—, provided that —C(═O)O— is excluded;B represents a group containing a hydrocarbon group having 4 or more carbon atoms wherein either a tertiary or a quaternary carbon atom is contained,when n is 2 or greater, the two or more -(A-B) groups may be identical to or different from each other; andM+ represents an organic onium ion.