A total heat exchanger of the present invention facilitates circulation of two types of air currents separated by a partition plate and conducts heat exchange of sensible heat and latent heat of the two types of air currents across the partition plate, wherein the partition plate has a porous resin base material layer, a fissured layer having a thickness of 2 μm or more and 50 μm or less and composed of a hydrophilic moisture-permeable resin, and a nonporous hydrophilic moisture-permeable resin film layer having a thickness of 0.5 μm or more and 10 μm or less laminated in this order. The total heat exchanger of the present invention can prevent reduction in performance even in an environment of repeated condensation and has a high total heat exchange efficiency.