1. The luminescence spectra of chloroform solutions of resins and asphaltenes, isolated from mazut, as well as components extracted from asphaltenes with petroleum ether, heptane, and benzene, were measured. 2. The luminescence of solutions of asphaltenes is due to the asphaltenes themselves, and not to resins that might have been adosrbed on the asphaltenes during their isolation from mazut. 3. The change in the intensities at the maxima of the luminescence spectra with dilution of the asphaltene solutions shows that at various stages of dilution the asphaltenes are in different aggregated states, and this is also manifested in a change in the structure of the luminescence spectra and a deviation of the concentration dependence from the usual one.