To improve a re-coloring property, a coloring and decoloring property, and repeat stability of coloring and decoloring property after preserving a recording medium in a decolored state, and the preservative stability in a colored state by making a diamine compound a compound shown by general formula.

A reversible recording layer is provided on a base body with a recording layer with a diamine compound and an electron capturing agent dispersed in resin, wherein the diamine compound is one shown by formula (in the formula, R0 shows a 1-5C alkylene group, a group-CH=CR5CH=CH-, a phenylene group, a naphthalene group, or an anthraselenium group. R1-R4 show an alkyl group in which two or more pieces thereof include an electron attractive group, and an ether group in a substitutional group, and the residue is another substitutional alkyl group, R5 shows a hydrogen atom or an alkyl group). The recording layer of a reversible recording medium is of a type which is colored by a high energy ray and decolored by heat.