The purpose of the present invention is to make it possible to easily fix a terminal in a state such that, when fitting a heat-shrinkage tube to a connection part of an electric wire and the terminal, a water cut-off agent inside the heat-shrinkage tube can be prevented from flowing into a counterpart-side connection part of the terminal. This terminal fixing jib is provided with: a terminal insertion support part that is formed in a shape into which a plate-like counterpart-side connection part of a terminal can be inserted into a terminal insertion recess part from an opening, a terminal insertion support part being formed in the terminal insertion support part so as to open toward the outer side. The terminal fixing jib is also provided with a terminal fitting fixing part that includes: a fitting part that can be fitted into a hole formed in the counterpart-side connection part; and a fitting part support part that, while biasing the fitting part in the advancing direction, supports the fitting part so as to be capable of moving forward/backward. The terminal fitting fixing part is fixed to the terminal insertion support part such that the fitting part can move forward/backward in contact with the counterpart-side connection part, and such that the fitting part can be fitted into the hole in the counterpart-side connection part in a state in which the counterpart-side connection part is inserted into the rear of the terminal insertion recess part.