A terminal fitting includes a terminal connection part and a crimping part. Paired front-side crimping pieces and a lower plate part constitute a wire barrel portion which contacts core wires exposed outside as a result of removal of coating disposed at an end portion of an electric wire and is crimped so as to surround the core wires. Paired rear-side crimping pieces and the lower plate part constitute an insulation barrel portion which contacts coating at the end portion of the electric wire and is crimped so as to surround the coating. At least one pair of the crimping pieces has a thin portion formed thinner than the lower plate part and contacting the electric wire end when the crimping pieces are crimped. The thin portion is formed at an intermediate portion of each crimping piece except for a peripheral portion.