A cable connection structure manufacturing method includes: covering, by a first electrode, an end face of an electric cable, and covering, by a second electrode, a terminal of a substrate; plastically deforming the first electrode and the second electrode having substantially same hardness by first scrubbing in which the first electrode and the second electrode rub against each other at a first pressure and a first amplitude; polishing the first electrode and the second electrode by second scrubbing in which the first electrode and the second electrode rub against each other at a second pressure smaller than the first pressure and a second amplitude smaller than the first amplitude; and bonding the first electrode and the second electrode at a third pressure higher than the first pressure.