An insert molding component includes a primary molding section having a concave portion formed in one surface thereof, the concave portion including stepped lower and upper concave portions, an insert component disposed on a bottom surface of the lower concave portion, a heat-insulating component disposed in the upper concave portion above an opening of the lower concave portion in which the insert component is disposed, and a secondary molding section disposed in contact with the one surface of the primary molding section.