There is provided a thermal transfer recording medium that is ruptured between a first ink layer and a base material layer or in the first ink layer when an external force is applied to the base material layer and the second ink layer in a direction in which the layers are separated from each other, in a first state in which the thermal transfer recording medium is heated to a first temperature or higher and a second temperature or lower and then cooled to a third temperature or lower. The thermal transfer recording medium is ruptured between the first ink layer and the second ink layer or in the second ink layer when the external force is applied in a second state in which the thermal transfer recording medium is heated to a temperature above the second temperature and then cooled to the third temperature or lower. A total thickness of all layers that are ruptured in the second state and are separated from the base material layer side is thicker than a thickness of any layer before thermal transfer except for the base material layer in a portion remaining without being separated from the base material layer.

An ink set for a thermal transfer sheet, comprising: a white ink; and a color ink having a color other than white, wherein the white ink contains a water-dispersible resin (A) and water, and the water-dispersible resin (A) has a thermal melting temperature of 100 C. or lower.

A thermal transfer recording medium is a thermal transfer recording medium to be transferred to a transparent film, including: a base material layer; and a first ink layer and a second ink layer that are sequentially laminated on the base material layer, in which the second ink layer has translucency that allows for visual recognition of the first ink layer, and has a complementary color relationship with the first ink layer. Also, a transfer-completed film is a transfer-completed film with a first ink layer, a second ink layer having translucency that allows for visual recognition of the first ink layer, and a transparent film laminated in this order, in which the second ink layer has a complementary color relationship with the first ink layer.