Following the cylindrical bend processing of the shape crimping portion corresponding part corresponding to the crimping section in the sheet-shaped terminal base material, the high bending-rate processing process of bend processing at a bending rate higher than a bending rate for plastically deforming at least a part of a deformation portion to be plastically deformed in a predetermined bend processing shape in the crimping portion corresponding part, and the shaping process of shaping the crimping portion corresponding part into the cylindrical crimping section are performed in this order.