According to the invention, there is provided a novel soybean variety designated XB29M08. This invention thus relates to the seeds of soybean variety XB29M08, to the plants of soybean XB29M08 to plant parts of soybean variety XB29M08 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB29M08 with another soybean plant, using XB29M08 as either the male or the female parent.