Abstract
Statistical mechanical studies on the surface tension of the nemafic liquid crystals contacting with various surfaces are reviewed. Assuming the liquid crysyml is an assembly of cylindrical rods interacting via anisotropic attractive force as well as the hard-core repulsion, the general features and special characteristics of the interfacial propeffles, such as surface orientations of molecules, the anchoring energies, and so on, are interpreted comprehensively.