A method for forming a glittering coating film in which after a glittering base coating film is formed on a substrate to be coated by applying thereto a glittering base coating material containing a colloid particle liquid containing noble metal or copper colloid particles, the glittering base coating film is heated or set, and then a clear coating film is formed. By the method, a glittering coating film is provided which has weathering resistance and high gloss, and develops a metal feeling or a coloring metal feeling giving rise to a less feeling of metal particles than by the plating-tone coating film, and superior in design property.