Provided is a textile vascular prosthesis having various properties required of it and having a repair function that is similar to that of blood vessels in a living body and relies on spontaneous healing ability of a human body. The inner layer-covering rate C (%) is defined by the formula: C = W 1 × D 1 + W 2 × D 2 × 25.4 ˆ’ W 1 × W 2 × D 1 × D 2 / 25.4 × 25.4 × 100 , where D1 is the warp density (ends/25.4 mm) of an outer layer, D2 is the weft density (picks/25.4 mm) of the outer layer, W1 is the apparent width (mm) of a warp yarn of the outer layer, and W2 is the apparent width (mm) of a weft yarn of the outer layer. The inner layer-covering rate C (%), representing the coverage of an inner layer formed of warp yarn 3 and weft yarn 4 by the outer layer formed of warp yarn 1 and weft yarn 2, is 15% ‰¤ C ‰¤ 75%.
