Glass bottle forming method

This glass bottle forming method reduces the occurrence of defective products by facilitating the removal of air from inside a cavity of a blank mold when a gob has been introduced such that air does not remain in the cavity when settle blowing has been performed. The position of a plunger when the introducing a gob into the blank mold is set lower than the regular position of the plunger when forming the parison opening. A prescribed minimal gap g is provided between the plunger and a guide ring, and when the settle blowing is performed and the plunger is raised up to the regular position, no air is left in the cavity when settle blowing has been performed, thus decreasing the occurrence of defective products.