PURPOSE: To provide the hot dip tin coated copper wire which produces tin powder in a lesser amt. and is, therefore, not disconnected in a twisting stage, etc.

CONSTITUTION: The diameter of the copper wire 1 of the hot dip tin coated copper wire constituted by successively forming a copper-tin alloy layer 8 and a tin layer 9 on the copper wire 1 is confined to ≤0.3mm, the thickness of the copper-tin alloy layer 8 to ≤0.5μm, the thickness of the tin layer 9 to ≤1μm and the ratio of the thicknesses of the tin layer 9 and the copper-tin alloy layer 8 within a 3 to 0.2 range. The hard copper-tin alloy layer 8 is adequately exposed on the surface of the hot dip tin coated copper wire to protect the soft tin layer 9. The tin layer 9 pulverized by direct contact with jigs is suppressed. As a result, the disconnection of the conductor by clogging a twisting port with the tin powder does not arise any more in the twisting stage.