Microchip unit, and method of conducting biochemical reaction using the microchip unit

A method of performing a biochemical reaction using a microchip unit including a microchip in which a plurality of micro-channels are formed;

• a housing disposed below the microchip to fix the microchip;
• and at least two injecting and sealing elements that have through-holes corresponding to inlets of the microchip, wherein the injecting and sealing elements vertically fixed on top of the housing, slide in a horizontal direction from a first location to a second location and vice versa, the through-holes being aligned with inlets of the microchip so that a reaction solution can be injected through the through-holes when the injecting and sealing elements are placed at the first location, and the inlets of the microchip being sealed by elastic members formed on bottom surfaces of the injecting and sealing elements when the injecting and sealing elements are placed at the second location, the method comprising:
• sliding the injecting and sealing elements to the first location to inject the reaction solution via the through-holes;
• and
• sliding the injecting and sealing elements to the second location to seal the inlets of the microchip.