To provide a wire capable of improving the accuracy of a cut shape of a workpiece to be cut and cutting efficiency and a wire saw provided with the wire.

An uneven section 141b is formed in the outer peripheral face of a strand 141a of the wire 141 for cutting and machining the workpiece to be cut while running in contact with the workpiece to be cut and coated with a plating film 141c. The plating membrane in the recessed section becomes thicker than that in other sections because plating membrane goes more into the recessed section. The free abrasive grains used in cutting the workpiece to be cut is stuck in the plating membrane deeply. As a result, the holding force of free abrasive grains can be improved.