Metal member and manufacturing method for metal member

A manufacturing method for a metal member that includes a base material of which at least a surface is made of a material containing at least any one of Cu, Al, Sn, Ti, and Fe, as a main component, and an uneven portion having an uneven shape, which is formed on the surface of the base material, the manufacturing method comprising forming the uneven portion,

• wherein forming the uneven portion includes;
• irradiating a first region of the surface of the base material with a pulse-oscillating laser beam to melt the surface of the base material in the first region,
• generating metal particles from a vapor or plasma of a metal released to a predetermined atmosphere by melting the surface of the base material in the first region, and depositing the metal particles in the first region,
• irradiating a second region of the surface of the base material with the pulse-oscillating laser beam, the second region being adjacent to the first region, to melt the surface of the base material in the second region, and
• generating metal particles from a vapor or plasma of a metal released to the predetermined atmosphere by melting the surface of the base material in the second region, and depositing the metal particles in each of the second region and the first region adjacent to the second region.