The conductance and stretching length of the single C-60 molecule bridging two Au electrodes (C-60 molecular junction) were studied in air, mesitylene and 0.1 M HClO4 solution. In air, the C-60 molecular junction did not show any well-defined conductance value. In either mesitylene or HClO4 solution, the systems showed a conductance value of 0.01G(0). The stretching length of the single C-60 molecular junction was determined to be 0.01 nm. The values of the conductance and stretching length in solution were smaller than those obtained in ultra high vacuum, indicating the weak C-60-Au interaction in solution. Considering the particular shape of the C-60 molecule and the junction formation process in the present system, a sliding model was proposed to interpret the observation. (C) 2009 Published by Elsevier B. V.