A production method of multiple panes comprising: a first melting process of setting a desired temperature of a furnace to a temperature higher than a softening point temperature of the glass frit used for a hermetically bonding member and a region forming member causing melting of the hermetically-bonding member to thereby hermetically bond, with the hermetically-bonding member, peripheries of paired glass panels (2, 3) disposed facing each other at a predetermined distance to form a space to be hermetically enclosed between the glass panels (2, 3) and simultaneously melting and thus welding of the region forming member to the glass panels (2, 3) but without closing an air passage (5a, 5d, 5f) formed in the region forming member; an evacuating process of evacuating air from the space through an outlet to make the space be in a reduced-pressure state while temporarily decreasing and keeping the desired temperature of the furnace down to a temperature lower than the softening point temperature of the glass frit, and thus not melting and changing in shape the hermetically bonding member and the region forming member; and a second melting process of setting, while the space is being evacuated, the desired temperature of the furnace to a temperature higher than the maximum achieving temperature of the first melting process causing melting of the region forming member inside the space and consequently closing the air passage (5a, 5d, 5f) to thereby divide, after the space is made to be in the reduced pressure state, the space into an outlet region including the outlet and a reduced-pressure region other than the outlet region, wherein the hermetically-bonding member and the region forming member are made by use of the same low-melting glass frit. a first melting process of setting a desired temperature of a furnace to a temperature higher than a softening point temperature of the glass frit used for a hermetically bonding member and a region forming member causing melting of the hermetically-bonding member to thereby hermetically bond, with the hermetically-bonding member, peripheries of paired glass panels (2, 3) disposed facing each other at a predetermined distance to form a space to be hermetically enclosed between the glass panels (2, 3) and simultaneously melting and thus welding of the region forming member to the glass panels (2, 3) but without closing an air passage (5a, 5d, 5f) formed in the region forming member; an evacuating process of evacuating air from the space through an outlet to make the space be in a reduced-pressure state while temporarily decreasing and keeping the desired temperature of the furnace down to a temperature lower than the softening point temperature of the glass frit, and thus not melting and changing in shape the hermetically bonding member and the region forming member; and a second melting process of setting, while the space is being evacuated, the desired temperature of the furnace to a temperature higher than the maximum achieving temperature of the first melting process causing melting of the region forming member inside the space and consequently closing the air passage (5a, 5d, 5f) to thereby divide, after the space is made to be in the reduced pressure state, the space into an outlet region including the outlet and a reduced-pressure region other than the outlet region, wherein the hermetically-bonding member and the region forming member are made by use of the same low-melting glass frit.