A positive resist composition including a polymeric compound (A1) having a structural unit (a0) represented by general formula (a0-1) (R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms, R2 represents a divalent linking group, R3 represents a cyclic group containing —SO2— within the ring skeleton thereof) and a structural unit (a1) derived from an acrylate ester containing an acid dissociable, dissolution inhibiting group, an acid-generator component (B) and a fluorine-containing polymeric compound (F1) having a structural unit containing a base dissociable group.