It is aimed to enable a heat shrinkable tube to be mounted on a connected part of a core exposed portion of a wire and a terminal with high positioning accuracy. A terminal-fitted wire manufacturing method is for mounting a heat shrinkable tube on a connected part of a core exposed portion of a wire and a terminal. After the wire is inserted into the heat shrinkable tube, the terminal is connected to the core exposed portion. Thereafter, the heat shrinkable tube is moved to a position for covering the connected part of the core exposed portion and the terminal, and a part of the heat shrinkable tube is temporarily fixed to at least parts of the wire and the terminal. Thereafter, the heat shrinkable tube is mounted by being heated and thermally shrunk.