We have studied the solid-state C-13 CP/MAS NMR spectra of pyridine-swollen coal. The coal used in this study were Upper Freeport (UF, C 88 wt %), Wyodak (WY, C 75 wt %), and Yallourn (YL, C 65 wt %). Each coal was immersed in pyridine for 0 (momentarily) or Ih. For UF coal, the spectra of the coal immersed in pyridine were the same as the fresh coal and Pyridine peaks were ndt observed. So, most of the pyridine molecules in UF coal were thought to be in a mobile state. For WY and YL coal, it became clear from solid-state C-13 CP/MAS NMR that pyridine connected with coal in the form of hydrogen bonding. For WY coal, alpha- and beta-carbons’ peaks of pyridine were observed at 0 h after immersion and all carbons’ peaks were observed at 1 h after immersion. This was because the efficiency of cross polarization for gamma-carbon of pyridine in coal was different from alpha- and beta-carbons. For YL coal, all carbons’ peaks of pyridine were observed at both 0 and 1 h after immersion. The swelling of YL coal at 0 h after pyridine immersion seemed to be enough for the effective cross polarization for gamma-carbon of pyridine. The T-1(H) of pyridine-swollen coal was also measured. The T-1(H) Of UF coal decreased, while the T-1(H) Of WY and YL coal increased with the pyridine immersion. The change of the T-1(H) Of coal was followed by the change of molecular mobility of coal. WY and YL coal showed an increase in the T-1(H) With pyridine immersion, since these coals were at around omega tau c approximate to 1 originally and moved to the omega tau c much less than 1 region with the swelling by solvent immersion. But, UF coal showed a decrease of the T-1(H) on pyridine immersion, since the coal was at the omega tau c > 1 region originally and stayed in that region even after solvent immersion.