The object of the invention is a brush head for an electric toothbrush, the brush head comprising a hollow body part (1), a back and forth rotating shaft (3) inside the body part (1), and a rotating bristle carrier (7) rotated back and forth by the shaft (3) at the first end of the body part (1), and where the second end of the shaft (3) comprises a protrusion (3a) that is in an inclined angle (A) in relation to the rotation axis of the shaft (3). The inclination of the protrusion (3a) is directed towards the rotation axis of the shaft (3).