PURPOSE: To improve quality, yield, productivity, safety in the manufacture of a thin-wall small diameter tube of silver alloy by adopting stages of hot piercing rolling, hot diameter reducing rolling and cold working from a billet.

CONSTITUTION: The piercing rolling 1 of a silver alloy billet is conducted in a hot state and the pierced material is reduced 2 in diameter in a hot state to form a silver alloy tube stock. Then, the silver alloy tube stock is rolled 3 by a cold pelger rolling will. Cold drawing 4 is performed for the diameter reduced tube stock for the last time. Consequently, the thin-wall small diameter tube of silver alloy can be manufactured in good productivity and yield and in high quality.