To provide a measure for reducing the leaching values of alkali components defined in ISO4802 and the like as much as possible in a glass container for use in storage or the like of pharmaceuticals or the like. The measure includes a container converting process of processing a glass tube 60 into a container shape having a bottom 53 and an opening 51 to form a vial 50 and a fire blast process of scanning an inner surface 54 of the vial 50 with a flame 20 of a point burner 10 while emitting the flame 20 to an internal space 52 of the vial 50 and applying the flame 20 to the inner surface 54.
