It is intended to provide a microfluidic chip equipped with the micro-mixers and micro-mixers capable of performing efficient mixing of the two liquids more with a simple configuration. In order to achieve the above object, provided with a mixing tank provided in the bottom and the microchannel second liquid and first flows through each liquid inlet in communication with the fine trickle passage, the liquid inlet But, it is a micro-mixer is provided at a position deviated from the center of the bottom portion of the bottom. The liquid inlet may be provided at a position offset from the center line of the mixing tank. Furthermore, in a cross section along the horizontal direction of the inner space region surrounded by the inner wall of the mixing chamber, up to the inner wall according to one direction relative to the position of the virtual line which is drawn virtually upward from the center of the liquid inlet passes a second distance to the inner wall according to the opposite direction may be different from the first distance, the one-way.
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