Lathe machining member

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A lathe machining member is provided that, when a rare and expensive material is used as a raw material for forming a machined product, is capable of reducing waste of such material and reducing costs. For this purpose, a cylindrical core portion (3), at least a part of which is made of a noble metal alloy and which has a diameter larger than a maximum diameter of a shape obtained by lathe machining, and a hollow-cylindrical peripheral portion (2), which is made of a material different from the material of the core portion (3), are included. The core portion (3) is arranged in a hollow portion of the peripheral portion (2) with no space. The material applied to the peripheral portion (2) is a free-cutting material selected from a group of, for example, free-cutting brass, free-cutting phosphor bronze, free cutting nickel silver, and free-cutting beryllium copper. The noble metal alloy applied to the core portion (3) is, for example, alloy mainly consisting of silver (Ag), palladium (Pd), gold (Au), platinum (Pt), zinc (Zn), copper (Cu), iron (Fe), and nickel (Ni), alloy mainly consisting of palladium, silver, and copper, or alloy mainly consisting of silver, platinum, zinc, gold, and copper.