Sealing structure of sealed container, formation method therefor, gas generator using sealing structure of sealed container, and manufacturing method therefor

A sealing structure of a sealed container, comprising:

• a metallic cylindrical container having an opening;
• a metallic closing member that closes the opening, and having a first end surface facing outside the sealed container, a second end surface facing inside the sealed container, and an outer surface extending between the first end surface and the second end surface;
• and
• a seal member provided between an inner wall surface on a side of the opening of the metallic cylindrical container and an entire outer surface of the metallic closing member that radially faces the inner wall surface,
• wherein the inner wall surface and the outer surface are sealed by the seal member having been melted and solidified without deforming the inner wall surface and the outer surface, and
• wherein the seal member is a material different from the metallic cylindrical container and the metallic closing member.