To provide a stacked heat exchanger capable of sufficiently improving heat exchange efficiency without increasing pressure loss nor remarkably increasing an assembly volume and manufacturing cost.

In this stacked heat exchanger 1, a plurality of groups (cores 12) of core plates 15 and 16 are stacked between front and rear end plates 10 and 11; the inside surrounded by the end plates 10 and 11 and the core plates 15 and 16 are delimited into a pair of fluid chambers by brazing peripheral flange parts thereof to each other; and the respective fluid chambers are made to communicate with a pair of circulation pipes 31 and 32 respectively projected on the front-side end plate 10. The core plates 15 and 16, intermediate core plates 17 and the end plates 10 and 11 are provided with wavelike parts 100a-100e, respectively; and the respective fluid chambers are formed by spaces sandwiched among the wavelike parts 100a-100e.