An electric wire and terminal connecting construction has an electric wire having an insulation covering portion where a conductor portion is covered with an insulation material and a conductor exposed portion where the insulation material on an end portion of the electric wire is removed, a terminal including a crimping portion crimped to the conductor exposed portion to thereby be connected to the electric wire, and a seal portion covering the conductor exposed portion exposed from the terminal, wherein the seal portion has an external resin portion forming an outer surface side of the seal portion and made from a thermoplastic resin and an internal resin portion made from a thermoplastic resin of which a fusing point is lower than that of the external resin portion and forming an inner surface side of the seal portion, and is divided so as to be attached to the conductor exposed portion.