Method for manufacturing glass panel unit, and method for manufacturing glass window

A method for manufacturing a glass panel unit, the method comprising:

• an adhesive disposing step of disposing a thermal adhesive on a first panel or a second panel;
• a glass composite generation step of disposing the second panel to face the first panel to generate a glass composite which includes the first panel, the second panel, and the thermal adhesive and which has an evacuation port and an evacuation path,
• the evacuation port being formed in at least any one of the first panel, the second panel, or a first portion of the thermal adhesive which is to serve as a seal later, and
• the evacuation path being located between the first portion and a second portion of the thermal adhesive and extending to the evacuation port;
• an internal space forming step of heating the glass composite to melt the thermal adhesive to form an internal space surrounded by the first panel, the second panel, and a melted substance of the thermal adhesive except for the evacuation port;
• an evacuation step of exhausting gas from the internal space to evacuate the internal space;
• and
• an evacuated space forming step of, while the internal space is kept in an evacuated state, heating and applying force by a jig which is inserted between the first panel and the second panel to part of at least the first portion or the second portion to deform the part to close the evacuation path such that the internal space is sealed to form an evacuated space hermetically closed.