A wire clamp for protecting a wire in a reciprocating machine includes an upper clamping member and a lower clamping member configured for slidably sandwiching the wire therebetween. The upper clamping member or the lower clamping member is pivotably mounted to the reciprocating machine. When the wire bends to travel during reciprocating movement, the upper and lower clamping members are pivoted with the wire to prevent the wire from being sharply bent which leads to stress concentration. Thus, fatigue of the wire will be reduced and a life span of the wire will be prolonged.