HEAT EXCHANGER

To improve airtightness of a heat exchanger.SOLUTION: In a heat exchanger (10), a partition member 15 and a spacing member (25, 55) are alternately stacked. A frame (30, 60) extending along an outer periphery of the spacing member (25, 55) includes an outer side portion (33, 63) and an inner side portion (36, 66). The outer side portion (33, 63) extends along a circumference of the frame (30, 60). The inner side portion (36, 66) is located in an inner side of the outer side portion (33, 63), and extends along the outer side portion (33, 63). The inner side portion (36, 66) fastens and holds the partition member (15) between the spacing member (25, 55) located adjacent thereto and itself. An outer side gap (81) is formed between the outer side portion (33, 63) and the spacing member (25, 55) located adjacent thereto.SELECTED DRAWING: Figure 12 【課題】熱交換器の気密性を向上させる。【解決手段】熱交換器（10）では、仕切り部材（15）と間隔保持部材（25,55）が交互に積層される。間隔保持部材（25,55）の外周に沿った枠部（30,60）は、外側部（33,63）と内側部（36,66）とを備える。外側部（33,63）は、枠部（30,60）の周縁に沿う。内側部（36,66）は、外側部（33,63）の内側に位置し、外側部（33,63）に沿う。内側部（36,66）は、その隣に位置する間隔保持部材（25,55）との間に仕切り部材（15）を挟んで保持する。外側部（33,63）と、その隣に位置する間隔保持部材（25,55）との間には、外側隙間（81）が形成される。【選択図】図１２