Device (1) for the heat treatment of scalp hair (2) of a person (3), consisting of one first and one second heat radiator (11, 12), which are formed and arranged facing each other as a left side radiator (4) and as a right side radiator (5) to provide heat (6) to the side scalp hair (7), wherein the left side radiator (4) has one first ring-shaped infrared radiator (21) with one first shell ring reflector (22) and the right side radiator (5) has one second ring-shaped infrared radiator (21.1) with one second shell ring reflector (22.1), wherein at least one third heat radiator (13) is provided for heat treatment of the remaining scalp hair, wherein all heat radiators (11, 12, 13) are arranged in a so-called open design to provide for unlimited handling and observation of the scalp hair (2) and extensive visual freedom for the person (3) during the heat treatment, characterized in that the first shell ring reflector (22) of this type has at least one first infrared radiation screen (31) and the second shell ring reflector (22.1) has at least one second infrared radiation screen (32) arranged as symmetrical mirror images and on the radiation side, and characterized in that radiation intensity (35) in the area of the contour (36) of an average hairline is gently reduced in the direction of the face (37) of the person (3) (FIG. 4).