It is generally considered that there were no synovial membranes covering the surfaces of the meniscus. Therefore, the existence of synovial membrane is of importance in the repairing of menisci (20 menisci altogether) studied by using histological methods. The staining methods included hematoxylin and eosin(HE), Mallory and VG(van Gieson)specific technique. The main results are as follows:1. On the horizontal sections of the menisci, it shows clearly that the synovial membranes at the interior margin of the menisci is different from that of the other part.2. On the frontal section of the menisci, there are synovial membranes covering the superior and inferior surfaces of the menisci, especially evident on the inferior surface.3. On the other section of the menisci, it is observed that the synovial membrane of capsule is closely associated with that of menisci. The latter is the continuation of the former.4. On sections to which Mallory and VG staining methods were applied, the synovial that covered the menisci were observed to be the continuation of that the capsule.