Heat exchanger and ventilator having the same

The present invention relates to a ventilation device with heat exchanger, and it has an improved structure to prevent air from being leaked through a heat exchanger. It is configured to include a plurality of liner and, disposed between the liner having a spacer for forming the air flow channel heat exchange elements and the corner guides coupled to the edge portion of the heat exchange element with a predetermined interval heat exchanger in the invention laminate. In particular, the corner guide is able to stably close contact with the corner guide I have a guide channel to form a space for accommodating the edges of the heat exchange elements, through these guide channels in the heat exchange element, which is also coated between the heat exchange elements and the corner guides can be minimized that the corner guide deultteuneun due to the adhesive.