The viscosity of the ice premelting layer in contact with silica in the temperature range of -18 to -1 degrees C was studied by resonance shear measurement (RSM). The viscosity of the ice premelting layer was determined to be similar to 5 orders of magnitude greater than that of the bulk liquid water and continuously decreased with the increasing sliding speed between the two surfaces over the temperature range employed in this study, which was the same behavior as for the typical confined liquids including water. On the other hand, the normal load and the contact pressure did not influence the viscosity, indicating that the premelting layer behaved differently from the typical confined liquids.