Abstract: The relationship between the anatomical structure of Masson pine seed and its germinability has been studied by direct x-radiography. The reduction factors of each Development Class (DC) have been determined. It was believed that the germinability of fresh seed sample of Masson pine could be evaluated by x-radiography. The x-ray contrast method (XC) for determining the germinability of Masson pine seed and its standardization was described. It was found that the potassium iodide was the best one among 13 contrast agents studied for Masson pine seed. The results show that only the unimpregnated Masson pine seeds on radiography image could be considered germinable. The germinability of the sample determined by the x-ray contrast method agreed very well with their germination values.