A method for forming a vent port in a glass panel and a glass panel product manufactured using the same. The vent port has no protruding vent pipe, such that the vent port discharging gas from a sealed space to the outside is formed in either one of a pair of plate glasses separated in a thickness-direction to form the sealed space therebetween, produced by: forming an exhaust hole in either one of the plate glasses; vertically inserting a vent-pipe-type sealing material into the upper portion of the exhaust hole; discharging gas from a space between the plate glasses to the outside; heating the sealant member such that the sealing material is converted into fluid and the exhaust hole is closed by the sealing material having collapsed after being heated; and solidifying the sealing material remaining in the exhaust hole, ensuring good sealing properties without using a protruding vent pipe.