Bending strain, which exerted on contact wire with every pantograph passage, may cause fatigue of contact wire. We designed a cross-section shape of contact wire in an attempt to reduce this bending strain. We confirmed that this cross-section shape did not make worse galloping property (property of vertical vibration caused by a cross wind) through wind tunnel tests. We also confirmed that this cross-section shape could be applied to manufacturing contact wire with high strength copper alloy through trial manufacture. Compatibility with fittings (hanger ears, double ears, termination fittings, etc.) was tested with this trial piece and no problems were found. A meaningful decrease in bending strain was observed in pantograph running tests.