To provide a vehicle door trim mechanism capable of storing a wet umbrella, capable of solving problems for example, a general shaped umbrella which is not a folding type cannot be easily stored in a door trim.SOLUTION: For storing an umbrella in a door trim, the umbrella is fixed in an obliquely tilted state. For facilitating putting the umbrella into the door trim, a vertically long slit which is perpendicular to a ground surface, is provided. Directly underneath the slit, an arc shaped flat side surface is formed so that the umbrella rotates by its own weight and is tilted obliquely when the umbrella is inserted into the slit, and a hole shape is formed which matches a movement locus of the umbrella until the umbrella is fixed.SELECTED DRAWING: Figure 1