Abstract: The moleculer structures of eight alkylaminopyridines, seven of them are new compounds, were determined and investigated. The assignment of ¹³C NMR spectral lines has been made by double irradiation NMR and other techniques. The substitutive parameters of NMR and NR, groups for pyridine ring and those of pyridyl amine for alkane were worked out and compared with those of NH₂ group. The variations in electron cloud density were also discussed.