Method of manufacturing gas turbine part using porous metal

A method of manufacturing a gas turbine part including a member having a plurality of fluid transmission paths therein utilized as a cooling/heat insulating structure, comprising the steps of:

• melting a metal as a raw material of the member under pressurization of an atmospheric gas;
• dissolving a gas in the metal in a molten state;
• and
• solidifying the metal to thereby manufacture the member including a porous metal having thus created pores, wherein the pores of the porous metal are arranged as a plurality of through pores and/or closed pores, each of which is formed in an substantially linear shape and acts as a fluid path and/or as a void exhibiting a heat insulting effect, by controlling an angle of a solid-liquid interface in solidification with respect to a plane perpendicular to a traveling direction of the solid-liquid interface, which is a determination factor of a pore growing direction.