A conversion process of gabapentin hydrochloride into gabapentin comprising: a) dissolution of gabapentin hydrochloride in a solvent in which the gabapentin hydrochloride and the gabapentin are completely soluble; and b) subsequent addition of an amine that allows the removal of the chloride ion from the solution containing gabapentin hydrochloride, by precipitation of the hydrochloride of the same amine, leaving the gabapentin in solution in free amino acid form.