But what happened next isn't clear. The most popular story is that the hamburger was first put between two pieces of bread at the 1904 world's Fair in St. Louis. However, people in other places claim that they made the first hamburger Perhaps well never have a clear answer. But there's no question that the hamburger was a hit. Why? Perhaps because at that time, industry was growing, and a kind of fast, practical, and cheap food was needed for workers, or perhaps it was just because hamburgers tasted good