By the reaction of epichlorohydrin and ethylenediamine in the presence of hydrochloride, a new cationizing agent, N-(3-chloro-2-hydroxypropyl) ethylenediamine hydrochloride was prepared and it was introduced to cellulose fabric to improve its dyeablility. Optimum conditions like time and temperature of cationization of cellulose fiber were investigated. Dyeability and tensile strength of cationized cellulose fabric were assessed. The introduction of aminium group to cellulose by treating with the new cationizing agent improved the adsorption and fixation of reactive dyes. Thus highly reactive dyeing was possible even in the absence of alkali. Tensile strength was not diminished greatly.