Abstract: The invention relates to a color chamber doctor blade 1, which has following characteristic features: two doctor blade knives 2 that can be set up in a roof-like fashion against a roller 6 from which two doctor blade knives 2 can be fixed on the doctor blade chamber body 5 by means of a clamping plate 3 whereby the clamping plate 3 is in active connection with long-stretch fasteners 4 in the axial direction (z) of the roller 6, which are arranged essentially parallel to the clamping plate 3 and from which the force required for fixing at least one doctor blade knife 2 is applied. Inventive is that the resultant of the force exercised by the fasteners 4 points to the doctor blade chamber body 5.