Using washed woolen plain fabrics (muslin) under various conditions, the effects of the frictional coefficient of fibers on that of a fabric surface were studied. The following results were obtained;
1. The mean frictional coefficient (MIU) of a fabric surface was affected by shrinkage when it was the same as the frictional coeffeicient of fibers.
2. The mean frictional coefficient (MIU) of a fabric surface decreased with reduction in that of fibers when fiber shrinkage was the same as that of fibers.