PROBLEM TO BE SOLVED: To provide a damper for suppressing relative vibration between two suspension wires with frictional resistance between members.
SOLUTION: In the damper 1, two suspension wires M suspended so as to support different trolley wires downward and extend substantially in parallel are interconnected, and the relative vibration between the two suspension wires M is suppressed by the frictional resistance between the members. A body 2 to be fixed to one suspension wire M and a turning arm 8 pivoted by the other suspension wire M so as to move relatively in the axial direction is pivotably adhered to the body. The turning of the turning arm 3 by the relative vibration between the two suspension wires M is suppressed by the frictional resistance by a frictional resistance member 4. The frictional resistance by a frictional resistance member 4 can be adjusted by position change of a spring bearing member 11.