The cationized cellulosic fibers with n-alkyldimethyl-3-chloro-2-hydroxypropylammonium chlorides having an alkyl group of different chain lengths were dyed with several reactive dyes under the recommendable dyeing recipe from the dyestuff producers. In practical dyeing recipe of cellulosic fiber with reactive dye the enormous amount of electrolyte (ex. sodium sulfate) is applied to promote the dye adosorption on the fiber prior to chemical reaction of fiber with dye. The cationized fibers resulted in a high level of dye-exhaustion in dyeing with reactive dyes without the addition of electrolyte. The order of the dye-exhaustion level in the cationized fibers having alkyl chain length of 1, 8 and 16 was different with each dye used. The dyed cationized fibers were superior in color fastness to the dyed original cellulosic fiber, whereas the dyed fiber C16 having alkyl chain length of 16 was considerably inferior in color fastness to light and wet rubbing
