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本实用新型提供一种翅片管热交换器。翅片管热交换器(100)具备:形成有山部(34)和谷部(36)且具有贯通孔(37h)的翅片(31);通过贯通孔(37h)的传热管(21)。翅片(31)在贯通孔(37h)的周围具有从贯通孔(37h)侧朝向山部(34)侧隆起的周围倾斜部(39)。周围倾斜部(39)具有狭缝(23)。狭缝(23)例如是从贯通孔(37h)侧朝向山部(34)侧延伸的狭缝。