A positive photosensitive resin composition comprising (A) a polyamic acid, (B) a 1,4-dihydropyridine derivative represented by the general formula (II): ##STR00001## wherein R.sup.2 is a monovalent organic group; each of R.sup.3, R.sup.4, R.sup.5, and R.sup.6 is independently hydrogen or a monovalent organic group; and Ar--NO.sub.2 is an aromatic hydrocarbon group having a nitro group at ortho-position, and (C) an amine compound.