A sublimation-type thermal image transfer recording medium is composed of a support, a dye-containing layer formed on the support, containing a sublimable dye, and a top layer formed on the dye-containing layer, containing a hydrolyzed product of a silane coupling agent. This sublimation-type thermal image transfer recording medium may be composed of a support, at least two dye-containing layers formed on the support, containing a sublimable dye and an organic binder agent in which the sublimable dye is dispersed, and a top layer formed on at least the two dye-containing layers, containing a hydrolyzed product of a silane coupling agent. Alternatively, the above sublimation-type thermal image transfer recording medium may be composed of a support, a dye-supply layer formed on the support, containing a sublimable dye and an organic binder agent in which the sublimable dye is dispersed, a dye-transfer layer formed on the dye-supply layer, containing a sublimable dye and an organic binder agent in which the sublimable dye is dispersed and a low-dyeable resin layer formed on the dye-transfer layer, containing an organic binder agent and a hydrolyzed product of a silane coupling agent.