The frictional behavior of a C-60 monolayer film between graphite substrates is studied using a homebuilt surface force apparatus. The mean frictional force from the C-60 monolayers is estimated to be approximately 2 mN, which is one-fifth that of C-60 thin films. The (C60) monolayer films exhibit a low frictional force of 2 mN up to 100 scans under a normal stress of 8 MPa, which indicates that the C-60 monolayer film is highly promising for use as a lubricant. (C) 2003 Elsevier Science B.V. All rights reserved.