A touch screen input apparatus including a plurality of touch screens, a chip mounter provided with the apparatus, and a method for controlling the chip mounter are provided which improve the capability of controlling the chip mounter. The touch screen input apparatus of a chip mounter comprises a plurality of monitors dispersedly disposed in the vicinity of the chip mounter to provide display screens for inputting the letter or numeral, a touch panel attached to each monitor for recognizing a touched coordinate on each display screen and outputting an electrical signal, priority order and release time controlling means for receiving the signals output from the touch panels and recognizing the order of generation thereof, and a multiplexer for receiving the signals output from the touch panels and sequentially selecting and outputting the input signals according to the order recognized by the priority order and release time controlling means. The touch screen input apparatus includes the monitors and the touch screen which are located at different places in order to control the chip mounter, thereby improving the operational capability of the chip mounter.