introduction of substituents, the syntheses of 1,8-bisdehydro[14]- and 6,8,15,17-tetrakisdehydro[18]annulenes bearing p-substituted phenyl group(s) have been performed. The examination of their 1H NMR spectra indicates that the low field shift of NMR signals can be regarded as a superposition of three effects, i.e., 1) decrease of ring current in annulene nucleus by perturbation of substituent group(s), 2) Deshielding