The present invention provides a radiation-sensitive resin composition that contains a polymer having a structural unit that includes an acid-labile group; and an acid generator, wherein the acid generator includes a compound including a sulfonate anion having SO3−, wherein a hydrogen atom or an electron-donating group bonds to an α carbon atom with respect to SO3−, and an electron-withdrawing group bonds to a β carbon atom with respect to SO3−; and a radiation-degradable onium cation. The compound preferably has a group represented by the following formula (1-1) or (1-2). In the following formulae (1-1) and (1-2), R1 and R2 each independently represent a hydrogen atom or a monovalent electron-donating group. R3 represent a monovalent electron-withdrawing group. R4 represents a hydrogen atom or a monovalent hydrocarbon group.