Organic-inorganic layered perovskite compounds described by (RNH3)(2)MX4 [R: alkyl group, M: divalent metals, X: halogen] were reported to form self-organized quantum-well structures. In this study, we aimed to synthesize novel organic-inorganic self-organized compounds with quaternary ammonium ions instead of primary alkylammonium ions. New compounds, [(C12H25)(2)(CH3)(2)N]PbBr2 (DLDMPbBr) and [(C12H25)(2)(CH3)(2)N]PbI2 (DLDMPbI) were synthesized, and the structural characterizations were performed on X-ray diffraction and optical measurements. The absorption peaks of these compounds showed higher photon energy than those of conventional layered perovskite compounds with primary alkylammonium ions. This result indicated that novel quantum confinement structures were constructed with the DLDMPbBr and DLDMPbI.