(1) The Raman spectra of the following substances have been measured: methyl, ethyl, n-propyl, n-butyl, iso-propyl, iso-butyl, iso-amyl, cyclo-hexyl, o-kresyl and n-octyl benzoates, benzoyl chloride, phenol esters of acetic acid and butyric acid and o-kresyl acetate. (2) The constitutive influences exserted on the well-known frequencies of the benzene ring have been observed. (3) The relation among the frequencies in the region between Δν=2860 and 2980 cm.−1 associated with the C-H linkage of alkyl radicals have been studied for the series of benzoates. It has been found that the intensity and the breadth of the line corresponding to the shift of Δν=1450 cm.−1, considered to be attributable to the transversal vibration of hydrogen atom in the CH2- group, increases as the carbon atoms-of the homologue are increased. (4) The frequencies of Δν=1720, 1270, 670 cm.−1 in benzoates are estimated to be possibly attributed to the frequencies of the -CO-O- group. (5) The following shifts corresponding to the inner vibrations between atoms or atom groups shown below have been established: (Remark: Graphics omitted.) (6) The frequency of Δν=814 cm.−1 in methyl benzoate has been estimated to be attributed to the bond between methyl group and the acid rest. The frequencies in the region between Δν=810 and 863 cm.−1 have been explained to be attributable to the valency frequencies between the acid rest and the adjacent -CH2- group. The two frequencies in the region between Δν=810 and 846 cm.−1, in n-propyl, n-butyl, iso-butyl and iso-amyl benzoates have been explained by the consideration of the free rotation of the alkyl rest. (7) The valency and the deformation frequencies have been thoretically calculated, assuming that the molecule is composed of some systems of three atoms or atom groups.