This invention relates to an antimicrobial fiber, fabric and wound dressing containing silver, and its method of manufacturing. The silver is distributed evenly in the fiber structure and on the surface of the fiber. The fiber or the dressing contains 0.01-10% w/w of silver. The said wound dressing can release silver ions continuously to the wound site, providing an effective antibacterial function, and preventing wound infections from bacteria and other microorganisms. It is suitable for the management of chronic wounds.