A radiation-sensitive composition is to be used in exposure with an extreme ultraviolet ray or an electron beam, and includes a first polymer and a solvent, wherein the first polymer includes a first structural unit including: at least one metal atom; and at least one carbon atom that each bonds to the metal atom by a chemical bond and does not constitute an unsaturated bond, and at least one chemical bond is a covalent bond. Every chemical bond is preferably a covalent bond. The metal atom is preferably tin, germanium, lead or a combination thereof.