A device is provided by the invention, with which it is possible to execute a method for the dye fixation in reactive dyeing of cellulose goods or cellulose fibers of all types in a dye liquor containing auxiliaries for binding the reactive dye to the cellulose fibers, wherein in an air dryer the cellulose goods which are padded with the dye liquor can be subjected to a retentive treatment of predetermined length with a predetermined steam content of the air in the drying chamber. In the device the residual moisture of the cellulose goods is maintained at a value as far as the outlet of the chamber in which the reaction of the dyestuff with cellulose fibers takes place. A defined steam content of the chamber air can simultaneously be continuously--even with light goods--regulated independently of the weight of the goods, i.e. also independently of the amount of water brought into the dryer with the goods.