The hierarchical self-assembly behaviors of a series of amphiphilic liquid crystalline block copolymers (pEG(m)Az(n)), consisting of poly(ethylene glycol) (PEG) block and liquid crystalline polymer block (pAz) of poly{11-[4-(4-butylphenylazo) phenoxy]-undecyl methacrylate} containing an azobenzenzene mesogen, in the selective solvent diethyleneglycol, which is good for pEG block, were studied by polarized and depolarized light scattering. It was found that these copolymers can form micellar particles with internal ordered structures of optical anisotropy. Depending on the relative lengths of the blocks, the obtained micellar structures show optical anisotropies with different geometrical anisotropies. The higher composition of pAz-core blocks leads to the larger aggregate. The lower-molecular-weight copolymers tend to form the long and thin strings, which show rather the larger size with larger aggregation number. Even at the similar composition of pAz-core block, copolymers with different chain lengths can form the core of the different aggregating structures with the different molecular orientations. It was also found that the addition of a small amount of the surfactant, C12E25, makes the string-like aggregate shorter. (C) 2007 Wiley Periodicals, Inc.