A cooling device comprising - at least one compartment wherein foodstuffs desired to be cooled are placed, - at least one door providing access into the compartment and - at least one knob connected to a thermostat of the cooling device, said at least one knob being situated on a surface, facing the inner volume of the compartment, of one of the compartment walls and that enables the compartment temperature to be changed by the user, wherein the knob is a push-release type knob that has an active position wherein the temperature adjustment is performed by rotating the knob and a passive position to which the knob is changed by being pushed when the desired temperature value is set, - an opening arranged on the surface, facing the compartment inner volume, of said compartment wall, - a housing placed into the opening and in which the knob is rotated, - more than one transparent temperature value that is disposed around the knob and rotates together with the knob, - an indicator disposed on the housing, providing the temperature value adjusted by means of the knob to be displayed, characterized in that the knob in the passive position is almost coplanar with the compartment wall whereon it is situated and in that the cooling device further comprising - at least one light source that emits light into the housing - a switch that enables the light source to be activated when the door is opened, - a transparent illumination aperture extending along the line where the front and lateral surfaces of the knob intersect, - an at least partially circular carrier whereon the light source is placed so as to illuminate the illumination aperture when the knob is placed into the housing, - two upright members (10,110) extending from the base of the housing towards the knob and limiting the movement of the knob in the housing, wherein the carrier is placed between the two upright members (10, 110), and - a light transmitter extending from the light source towards the illumination aperture so as to provide the illumination of the temperature value at the level of the indicator. - at least one compartment wherein foodstuffs desired to be cooled are placed, - at least one door providing access into the compartment and - at least one knob connected to a thermostat of the cooling device, said at least one knob being situated on a surface, facing the inner volume of the compartment, of one of the compartment walls and that enables the compartment temperature to be changed by the user, wherein the knob is a push-release type knob that has an active position wherein the temperature adjustment is performed by rotating the knob and a passive position to which the knob is changed by being pushed when the desired temperature value is set, - an opening arranged on the surface, facing the compartment inner volume, of said compartment wall, - a housing placed into the opening and in which the knob is rotated, - more than one transparent temperature value that is disposed around the knob and rotates together with the knob, - an indicator disposed on the housing, providing the temperature value adjusted by means of the knob to be displayed, characterized in that the knob in the passive position is almost coplanar with the compartment wall whereon it is situated and in that the cooling device further comprising - at least one light source that emits light into the housing - a switch that enables the light source to be activated when the door is opened, - a transparent illumination aperture extending along the line where the front and lateral surfaces of the knob intersect, - an at least partially circular carrier whereon the light source is placed so as to illuminate the illumination aperture when the knob is placed into the housing, - two upright members (10,110) extending from the base of the housing towards the knob and limiting the movement of the knob in the housing, wherein the carrier is placed between the two upright members (10, 110), and - a light transmitter extending from the light source towards the illumination aperture so as to provide the illumination of the temperature value at the level of the indicator.