A microfluidic biochip includes an equal-liquid-level reservoir disposed on a cover. The equal-liquid-level reservoir includes some tanks that have a substantially same liquid level. Each tank has an opening on a bottom surface, each opening communicating with a corresponding micro-channel in a substrate.一種微流道生物晶片,包含等液位貯槽,設於蓋板上。等液位貯槽包含複數分槽,其內液面為實質等高,各個分槽的底面具有一開口,用以相應連通至基板內的微流道。400‧‧‧容器410‧‧‧等液位貯槽410A‧‧‧分槽410B‧‧‧分槽411‧‧‧分隔牆412‧‧‧開口43‧‧‧阻隔牆