Abstract: A shoulder strap for ladies' undergarments, more particularly a shoulder strap for brassieres, includes elastic warp threads and weft threads extending transversely of and woven into the warp threads. The shoulder strap has a longitudinal middle portion whose width is greater as compared to the width of the shoulder strap portions extending longitudinally from the middle portion. The spacing between the warp threads in the middle portion is greater than the spacing of the warp threads in the shoulder strap portions connected to the middle portion. The number of weft threads per unit of length in the longitudinal middle portion is greater than in the shoulder strap portions connected to the middle portion. The number of weft threads per unit of length in the middle portion may be approximately 50% greater than the number of weft threads per unit of length in the shoulder strap portions connected to the middle portion.