A photosensitive resin composition which is excellent in resolution, low in cost, and usable in a wide range of structures of polymer precursors each of which is reacted into a final product by a basic substance or by heating in the presence of a basic substance. The photosensitive resin composition includes a base generator which has a specific structure and generates a base by exposure to electromagnetic radiation and heating, and a polymer precursor which is reacted into a final product by the base generator and by a basic substance or by heating in the presence of a basic substance.