Device for mixing and kneading masses, preferably chocolate mass comprises: a horizontally arranged kettle (2) with an inner wall (3), which at least partially simulates an outer surface of a rotating body, preferably cylindrical jacket； a shaft； and at least one tool attached to it. At least one planar, deflector surface (8) is arranged in the kettle, where the deflector surface is extended in an axial direction, and is located outside and/or inside the outer surface of the rotating body. The mass is thrown against the deflector surface by the shearing tool into the device. Device for mixing and kneading masses, preferably chocolate mass comprises: a horizontally arranged kettle (2) with an inner wall (3), which at least partially, preferably 60-90% of its surface simulates an outer surface of a rotating body, preferably cylindrical jacket； a shaft； and at least one tool, preferably shearing tool attached to it. At least one planar, deflector surface (8) is arranged in the kettle, where the deflector surface is extended in an axial direction, and is located outside and/or inside the outer surface of the rotating body. The mass is thrown against the deflector surface by the shearing tool into the device.
