A bed frame includes a backrest, a bedstead and a plurality of connectors to couple the backrest with the bedstead. A connector includes first, second, third and fourth segments, in which each of the second, third, and fourth segments extends from a lower side of the first segment. A first slot is formed between the second and third segments to accommodate a bar of the backrest, and a second slot is formed between the third and fourth segments to accommodate a bar of the bedstead. When the bed frame is assembled, each connector in the plurality of connectors is fixedly coupled with the bar of the backrest, and snap-fitted on the bar of the bedstead.