The present invention relates to an integrated EGR cooler. The integrated EGR cooler comprises: a cooling core connecting an exhaust manifold and an intake manifold; and an integrated housing where the cooling core is inserted. The integrated housing comprises: a first discharge port discharging a coolant introduced to the integrated housing when a heat-sensitive device mounted in the integrated housing is operated; and a second discharge port always discharging the coolant introduced to the integrated housing. An amount of the coolant introduced to the EGR cooler is maximized, thereby maximizing cooling efficiency and minimizing a size of the cooling core.
