A pillar mounting device for manufacturing a glass panel unit , the pillar mounting device comprising: a sheet for forming pillars for a glass panel unit , the sheet comprising a base material having a sheet-like shape, the base material having a plurality of loop-shaped grooves , the base material having a plurality of portions serving as the pillars , each of the plurality of portions being surrounded by a corresponding one of the plurality of loop-shaped grooves , and the base material including a plurality of resin layers, a punch configured to punch at least one of the plurality of portions from the base material of the sheet to form at least one pillar , and a movement mechanism configured to move the at least one pillar to a surface of a substrate including a glass pane, and characterised in that (a) the movement mechanism includes at least one suction pin included in the punch , the at least one suction pin being configured to: punch the at least one of the plurality of portions from the base material to form the at least one pillar , and then move the at least one pillar to the surface of the substrate with the at least one pillar being sucked up by the at least one suction pin , or in that (b) the movement mechanism includes a suction tool configured to suck up the at least one pillar . a sheet for forming pillars for a glass panel unit , the sheet comprising a base material having a sheet-like shape, the base material having a plurality of loop-shaped grooves , the base material having a plurality of portions serving as the pillars , each of the plurality of portions being surrounded by a corresponding one of the plurality of loop-shaped grooves , and the base material including a plurality of resin layers, a punch configured to punch at least one of the plurality of portions from the base material of the sheet to form at least one pillar , and a movement mechanism configured to move the at least one pillar to a surface of a substrate including a glass pane, and characterised in that (a) the movement mechanism includes at least one suction pin included in the punch , the at least one suction pin being configured to: punch the at least one of the plurality of portions from the base material to form the at least one pillar , and then move the at least one pillar to the surface of the substrate with the at least one pillar being sucked up by the at least one suction pin , or in that (b) the movement mechanism includes a suction tool configured to suck up the at least one pillar . (a) the movement mechanism includes at least one suction pin included in the punch , the at least one suction pin being configured to: punch the at least one of the plurality of portions from the base material to form the at least one pillar , and then move the at least one pillar to the surface of the substrate with the at least one pillar being sucked up by the at least one suction pin , or in that punch the at least one of the plurality of portions from the base material to form the at least one pillar , and then move the at least one pillar to the surface of the substrate with the at least one pillar being sucked up by the at least one suction pin , or in that (b) the movement mechanism includes a suction tool configured to suck up the at least one pillar . <EOS>