To provide a manufacturing method of an electric resistance welded tube by which an end of a workpiece can be prevented from being fused.

In the manufacturing method of an electric resistance welded tube 11, the workpiece 2 is formed which is machined by bending a planar steel plate 1 into a tubular shape, and then both edges 4, 5 are welded to each other from the outside in the axial direction and joined. Shield members 6, 7 having deposition resistance are joined flush with both edges 4, 5 of the ends 2a, 2b of the workpiece 2, so that the welding is performed in a manner straddling over the shield members 6, 7 and both edges 4, 5.