A stainable decorative sheet having good adhesion between a paper base material and a nonwoven fabric with a surface excellent in tactile sensation and stainability, excellent transparency, and a method for coloring the stainable decorative sheet. The stainable decorative sheet includes a paper base material, an adhesive layer, a nonwoven fabric layer, and a transparency improving layer in a predetermined structure, wherein the nonwoven fabric layer partially has a filling part A and a filling part B in a part of voids among fibers of the nonwoven fabric layer.