Manufacturing method and heat exchanger

The manufacturing method of the present disclosure is a manufacturing method for manufacturing a heat exchanger having an evaporator that absorbs heat from the outside, moves a working fluid in a liquid phase by capillary force, and evaporates the working fluid into a gas phase, the manufacturing method including: a step of forming a recess in a plate surface of a first plate member, which is a plate-shaped member; a step for applying a material containing a powder to a predetermined region in the recess; a step for forming an evaporation body by curing the material applied to the predetermined region; and a step for covering the recess in which the evaporation body is provided with a second plate member, which is a plate-like member, and fixing the first plate member and the second plate member. 本公开的制造方法是制造具有蒸发体的热交换器的制造方法，所述蒸发体从外部吸收热，通过毛细管力使液相的工作流体移动并且使其蒸发为气相，所述制造方法包括以下工序：在作为板状的构件的第一板构件的板面形成凹部的工序；在凹部中的预先确定的区域涂布包含粉体的材料的工序；使涂布于预先确定的区域的材料固化而形成蒸发体的工序；以及用作为板状的构件的第二板构件覆盖设有蒸发体的凹部，将第一板构件和第二板构件固定的工序。