SCREEN PRINTER

To provide an improved temperature control device in an inner space of a screen printer. A temperature control device 20 is disposed in the inner space of a printer covered with a cover 24. A heating/cooling unit 100 thereof is disposed by being fixed to a printer main body 10 behind a mask holding device 16 within an upper section of the inner space. Four heating/cooling units 100 which heat and cool air by using a Peltier device assembly are disposed side by side in a width direction of the printer. A heat exchanger and a fan on a temperature control side are surrounded by a common housing 132. The air whose temperature is controlled inside the housing 132 is supplied to a blower 220 disposed adjacent to a mask 46 by using a hose 224, and is caused to blow to a squeegee moving region so as to control the temperature. Heat is radiated and absorbed by the heat exchanger and the fan on a side opposite to the temperature control side of the Peltier device assembly. Furthermore, a fan 190 promotes exhausting of air, thereby efficiently controlling the temperature.