To provide a material on which thermal transfer is to be performed on which thermal transfer printing can be repeatedly and surely performed at a preliminarily printed part.

The material 10 on which thermal transfer is to be performed contains a sheet-like base material 12. The preliminarily printed part 14 expressing a uniform letter or pattern is formed on the base material 12. In addition, on the base material 12, a pressure-sensitive self-adhesive layer 16 which covers the preliminarily printed part 14 and has optical transmitting properties is formed. On the pressure-sensitive self-adhesive layer 16, an ink receiving layer 18 with optical transmitting properties is formed. On the surface of the ink receiving layer 18, ink is transferred from an ink transferring ribbon to form a thermal transfer printing part 20. The preliminarily printed part 14 is formed below the ink receiving layer 18 and a user can see the preliminarily printed part 14 above the ink receiving layer 18. It is possible without any problems to form the thermal transfer printing part 20 laminated just above the preliminarily printed part 14.