To provide a discoloring body capable of being applicably developed in a toy, design, fashion, ornament field or the like since a phase changed in various colors can be visually sensed by temperature change of a domestic environmental temperature area and a medium of water or the like and the changed phase can be reversibly reproduced.

The discoloring body 1 which discolors by heat and water, is provided by laminating a reversible heat discoloring layer 2 containing a microcapsule connoting a reversible heat discoloring material comprising an electron donative coloring organic compound, an electron acceptive compound, and an organic compound medium reversibly generating a coloring reaction of those two compounds and a porous layer 3 containing a low refractive pigment.