The structure of Cu—Bi—Zr phase diagram in the area of copper corner is proposed. It has been shown, that Bi₂Zr compound can be in balance with copper solid solution in addition to phases from binary system. So we can conclude about presence of three-phase field of (Cu)+(Bi)+Bi₂Zr+Cu₅Zr. It has been established that for full binding of bismuth in Bi₂Zr compound, the additive of zirconium should be inducted in amount, based on correlation Zr:Bi ≥ 0,22% (mass.). It permit to elude formation of low-melting eutectics and get the globular inclusions of Bi-bearing phase instead of streak on the grain boundaries.