The invention relates to a process for the purification of a neutral human milk oligosaccharide (HMO) from a fermentation broth, the process comprising the steps of: (i) separating biomass from the fermentation broth to provide a crude solution; (ii) treating the crude solution with: (a) a cation-exchange material; (b) an anion-exchange material; and (c) a cation-exchange adsorbent resin; thereby obtaining a purified solution containing the neutral human milk oligosaccharide. Further, the invention relates to a process for fermentatively producing HMO in a fermentation broth and purifying the HMO from the broth.