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Who invented hot air balloon?

The hot-air balloon was invented by Joseph-Michel Montgolfier (1740–1810) and his brother Jacques-Étienne Montgolfier (1745–1799), who were French paper makers. They launched their balloon on June 5, 1783, in Annonay, France. Their invention, which was filled with heated air, ascended for about ten minutes.

Three months later they sent a duck, a sheep, and a rooster up in a balloon. The success of this flight prompted them to attempt a human launching.

In October 1783, the French scientist Jean-Francois Pilatre de Rozier (1756–1785) became the first person to make a balloon ascent, though it was tied down for safety.