A heater assembly includes a base panel; a heating member disposed behind the base panel opposite a heating target space; a thermal conductive film having a film shape, attached to an outer surface facing the heating target space of the base panel, and transmitting heat of the heating member to the outer surface of the base panel by having an end portion extending behind the base panel and coupled to the heating member; and a shield layer preventing the thermal conductive film from being directly exposed to the heating target space by being attached to an outer surface facing the heating target space of the thermal conductive film.