Abstract: Provided is a seat which achieves reduction in wrinkling and looseness while maintaining flexibility of a cover made of leather. The seat includes: a cover made of leather and covering a pad; and a base fabric adhered to the cover. The base fabric is an woven fabric including a plurality of first threads running in a predetermined direction and a plurality of second threads running in a direction intersecting the predetermined direction. The first threads and the second threads are woven in a zigzag manner to planarly fill a surface of the base fabric with polygonal space parts defined by the first threads and the second threads.