To provide a manufacturing method of a mat by which textile is colored first, or not colored first but dyed after cut into a prescribed shape, consequently the mat is manufactured inexpensively and excessive dye is unnecessary to eliminate waste.

The manufacturing method of the mat includes: a dyeing step A for dyeing mat textile; a backing pasting step B of pasting the backing to the mat textile; a cutting step C of cutting it into the shape of a prescribed mat body; a trimming step D of trimming of the cut mat body; and a component attaching step E of attaching a component to the trimmed mat body. A re-dyeing step F of re-dyeing the mat textile is provided after one of the cutting step C, the trimming step D and the component attaching step E. Alternatively, the re-dyeing step F of re-dyeing the mat textile is provided after one of the cutting step C and the trimming step D. Alternatively, a dyeing step G of dyeing the mat textile after one of the cutting step C, the trimming step D and the component attaching step E. Alternatively, the dyeing step G for dyeing the mat textile is provided after one of the cutting step C and the trimming D.