Since the dendritic poly(L-lysine)s combining eight to thirty-two free base-porphyrins showed split circular dichroism at the Soret band in toluene/N,N-dimethylformamide (9/1, v/v), the immobility of porphyrin rings was evaluated by H-1 NMR measurements in terms of the peak width at half-height and spin-lattice relaxation time.