PURPOSE: To obtain a thermal printer head having a protective film excellent in heat resistance and impact resistance by using a mixture of silicon carbide (SiC) and alumina (Al2O3) as a protective film covering the dot-forming portion of a heating resistor and a conductive electrode.

CONSTITUTION: In a thermal printer head 1, a heating resistor 3 is formed on a base plate 2 of ceramics, etc., and a common conductor electrode 5 and a separate conductor electrode 6 are formed on the resistor 3, excluding the dot-forming portion 4. A protective film 7 is formed on the resistor 3 and the electrodes 5 and 6. The film 7 is made of a mixture of SiC and Al2O3 by a method in which the base plate 2 with the resistor 3 and the electrodes 5 and 6 is put in an atmosphere of Ar gas and sputtering is made by using a target formed by bonding alumina plate 9 to a silicon carbide plate 8, for example.