adding a flux, comprising calcium oxide and 35 wt. % or more of calcium fluoride, to a melting raw material comprising a titanium material and an aluminum material and having a blending amount of Al of 50 wt. % or more, to obtain an added melting raw material;

adding the melting raw material to a water-cooled copper crucible with a discharging hole formed at a bottom portion;

induction-melting the added melting raw material in the water-cooled copper crucible under an atmosphere of 1.33 Pa or more, to obtain an induction melted raw material;

discharging the induction melted melting raw material downward from the discharging hole to separate the flux comprising oxygen liberated from the melting raw material by the induction-melting, to obtain a separated melting raw material and

casting the separated melting raw material to obtain the Ti—Al alloy,

wherein, before the casting, an output of the induction-melting is reduced to be 90% or less of an output at melting, and

wherein the separated melting raw material is discharged from the water-cooled copper crucible in a state where the output has been reduced.