According to the invention, there is provided a novel soybean variety designated XB04F08. This invention thus relates to the seeds of soybean variety XB04F08, to the plants of soybean XB04F08 to plant parts of soybean variety XB04F08 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB04F08 with another soybean plant, using XB04F08 as either the male or the female parent.