To provide paint films which have excellent heat-radiating properties and with which many colors with light colors in the main can be obtained. (Means of Resolution). A paint film which has excellent heat-radiating properties which comprises an undercoat paint film layer which contains from 1 to 20 mass % with respect to the total solid fraction of the paint film of carbon black and a top-coat paint film layer which contains 1 to 40 mass % with respect to the total solid fraction of the paint film of a pearl pigment and which does not contain aluminum powder and the paint film thickness of the top-coat paint film layer is from 11 to 50 .mu.m which can be formed with a method of forming paint films which have excellent heat-radiating properties wherein an undercoat paint which contains from 1 to 20 mass % with respect to the total solid fraction of the paint film of carbon black is applied and hardened and an undercoat paint film layer is formed and then a top-coat paint which contains 1 to 40 mass % with respect to the total solid fraction of the paint film of a pearl pigment and which does not contain aluminum powder is applied over said undercoat paint film layer and hardened and a top-coat paint film layer of which the paint film thickness is from 11 to 50 .mu.m is formed.