Decorative plastic molded article and manufacturing method thereof

A decorative plastic molded article having light transmittance property, comprising a molded article body, wherein,

• said molded article body has a plate-like portion having a first surface and a second surface, opposite to the first surface, on which a small concave and convex portion is formed;
• the small concave and convex portion has a plurality of inclined surfaces;
• wherein, a light from outside the molded article body enters the first surface and transmits inside the molded article body, and then reflects at the inclined surfaces toward the first surface, the refractive index of the molded article body is higher than that of a medium outside the inclined surfaces of the molded article body;
• and wherein,
• when viewed facing to the first surface from outside the molded article body, the molded article body has an outer appearance of metallic color like and a display of a character, a graph or a symbol,
• wherein, the outer appearance of metallic color like is obtained by the total reflection light being a part of the reflection light at the inclined surfaces, and the display of a character, a graph, or a symbol is obtained by the light of (1) or (2) below:
• (1) the transmissive light through a planar transparent portion with shape of a character, a graph or a symbol formed in the small concave and convex portion;
• (2) the total reflection light at the small concave and convex portion with shape of a character, a graph or a symbol.