PROBLEM TO BE SOLVED: To provide a polishing device for metal texture observation and a polishing method for metal texture observation capable of highly accurately polishing a metal texture observation objective pipe.SOLUTION: A polishing device for metal texture observation includes: a support member 7 which is supported by a metal texture observation objective pipe 8 for forming a channel; a screw 14 supported rotatably around a rotation shaft 19 as a center by the support member 7; a grinder 17 which polishes an outer surface of the metal texture observation objective pipe 8 by rotating a grind stone 18 around a rotation shaft 20 as a center which is non-parallel to the rotation shaft 19; and a feed screw mechanism 15 which subjects the grinder 17 to parallel movement in parallel to the rotation shaft 19 by rotating the screw 14. Such a polishing device 1 for metal texture observation can move the grinder 17 highly accurately in a radial direction of the metal texture observation objective pipe 8 by rotati
