Abstract: The results of x-ray wood density of Ginkgo showed that the wood density was fractal in inter ring, intra-ring and whole-disc. The fractal dimension of Ginkgo wood from Jiangsu Province was 1.4430, respectively. Fractal dimension was a very important quantity of wood properties, it has relation with the ring width and has little relation with the ring density. The application of fractal theory is at the beginning of going into the wood science. It will make a great development in the wood science in future.

Key words: Ginkgo, Wood density curve, Fractal