Kneading rotor and mixer

Kneading rotor of the present invention (1) about the axis in the horizontal direction is rotatably disposed, and around the axis have at least two or more of the kneaded material kneading blade (7). In axial cross section kneading rotor (1) perpendicular to the kneading blade (7) provided when (1) the rotor rotational kneaded material opposite the head (9). The head (9) in the kneading blade (7) is formed with a head (9) towards the recess portion (10) recessed radially inward.