Kaempferia mahasarakhamensis sp. nov. (Zingiberaceae), a new species from Northeastern Thailand, is described, photographed and illustrated. It can be easily recognized by its erect and elongate psuedostem, length of leaf sheaths and leaves elliptic with apex acuminate. The new species resembles K. larsenii Sirirugsa but it differs in its two leaves, pseudostem high, blade broadly elliptic, leaf apex acute, length of leaf sheath, length of petiole, number flower per inflorescence, white flower and labellum white with two darker purple patches towards the base.