Many printers incorporate heaters to fix ink on printing paper, increasing the power consumption of the printers. Currently, a novel power saving technology using a thermal print head instead of a heating roller has been progressed. However, there is concern that contact failure may occur with the heating system using the thermal print head because the thermal print head is constructed on a hard glass substrate and is hardly deformed. In this study, we aimed to establish a method of evaluating the performance of thermal print head by contact heat transfer simulation. First, we experimentally obtained the contact heat transfer coefficients under various contact pressures to consider the effects of the real contact area between the thermal print head and transfer belt. Then, we simulated the heat transfer process of the thermal print head, incorporating the relationship between the contact pressure and the contact heat transfer coefficient. We elucidated the contact heat transfer characteristics of the thermal print heads having four different kinds of structure and how heat was transferred through the contact interfaces.