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In the hexachloridoanimonate anion of the title compound, (C12H17N2O)[SbCl6], the Sb5+ion is in a slightly distorted octahedral coordination. In the 4-(2-methylpiperidine-1-carbonyl) pyridinium cation, the dihedral angle between the mean planes of the pyridine and piperzine rings is 66.3 (3)°. The mean plane of the carbonyl group is twisted by 80.5 (7)° and 42.7 (4)° relative to the mean planes of the pyridine and piperzine rings, respectively. The methyl group is in an R configuration relative to the piperidine ring which is in a slightly distorted chair conformation. The crystal packing is stabilized by N—H...O hydrogen bonds between cations, which form infinite zigzag chains parallel to [010].