HEAT PIPE AND METHOD FOR MANUFACTURING HEAT PIPE

A heat pipe is provided with a container in which a working fluid is sealed, and a first core. The container has an inner space and an inner circumferential surface facing the inner space. The first core part is accommodated in the internal space. A vapor flow path is formed in the internal space. The container has a second core. The second core portion includes a plurality of grooves formed in the inner peripheral surface of the container. The first core has a pore layer and a holding layer that holds the pore layer. The pore layer has an effective pore radius smaller than that of the second core. The first core portion is in contact with the vapor flow path and the second core portion. 热管具备：封入有工作流体的容器、和第一芯部。所述容器具有：内部空间、和面向所述内部空间的内周面。所述第一芯部收纳于所述内部空间。在所述内部空间形成有蒸气流路。所述容器具有第二芯部。所述第二芯部包含多个槽，该多个槽形成于所述容器的所述内周面。所述第一芯部具有：细孔层、以及保持所述细孔层的保持层。所述细孔层具有比所述第二芯部小的有效细孔半径。所述第一芯部与所述蒸气流路以及所述第二芯部相接。