Appliances for the partial dyeing of hair are intended, for example, to serve for dyeing individual strands of hair, in order to achieve stylish effects as a result of the color contrast.To ensure that the appliance is mastered even by less experienced staff and that dyeing is simplified and speeded up, the appliance has at least one guide prong (14), which is provided in its interior with a dye-feed bore (16) and on at least one side, spaced at a distance from the prong end (19), with at least one peripheral dye-outlet orifice (21). The appliance also includes a dye container (3), which is connected to the dye-feed bore (16) of the guide prong (14) and out of which the dye can be expressed by means of pressure, and at least one masking prong (22) which is located spaced at a distance from the guide prong and covers hair not to be dyed and which is located, approximately transversely to the working direction of the guide prong (14), next to the latter.