A micro channel type heat exchanger, including a first pass which is disposed in some of flat tubes disposed in a first heat exchange module and along which a refrigerant flows in one direction, a second pass which is disposed in remaining some of the flat tubes disposed in the first heat exchange module and along which the refrigerant supplied from the first pass flows in an opposite direction to the direction of the first pass, a third pass which is distributed and disposed in the remainder of the flat tubes disposed in a first heat exchange module other than the first pass and the second pass and in some of flat tubes disposed in a second heat exchange module, and a fourth pass which is disposed in the remainder of the flat tubes disposed in the second heat exchange module and along which a refrigerant supplied from the third pass flows in an opposite direction to a direction of the third pass.