Abstract: The present invention provides a pile sock which can lighten a sense of tiredness and has improved air permeability. A sole portion of the pile sock is knitted almost thoroughly in pile stitches. The sock is excellent in the cushioning properties and able to reduce load to a foot. It also has good sweat-absorption characteristics. A toe-side section of the pile sock works effectively to prevent slippage. An arch region of the sole portion has a smaller area of the pile stitch segments than an area of the plain stitch segments in comparison with a ground contact region of the sole portion. Arranging the plain stitch segments and the pile stitch segments in a lattice pattern allows a sense of stimulation and air permeability to be uniformly provided.