A connector, comprising: a terminal fitting which includes a wire connecting portion connected to an electric wire and an electric contact portion disposed coaxially with the wire connecting portion; a connector housing which includes a fitting portion for fitting to a mating connector; a terminal accommodating chamber which is provided in the connector housing, and which includes: a first accommodating portion for accommodating the wire connecting portion; a second accommodating portion which is continuous with the first accommodating portion to accommodate the electric contact portion and which is smaller in diameter than the first accommodating portion; a stepped surface formed between the first and second accommodating portions (15, 16); a flange portion is provided which projects from an outer peripheral surface of the wire connecting portion so as to contact the stepped surface; and a sleeve member is provided, said sleeve member being formed into a cylindrical shape which is C-shaped in cross section, characterized in that: a rear holder is provided which is fitted at an end portion of the connector housing on an opposite side of the fitting portion; and the sleeve member is provided between the flange portion and the rear holder so as to be accommodated in the first accommodating portion. a terminal fitting which includes a wire connecting portion connected to an electric wire and an electric contact portion disposed coaxially with the wire connecting portion; a connector housing which includes a fitting portion for fitting to a mating connector; a terminal accommodating chamber which is provided in the connector housing, and which includes: a first accommodating portion for accommodating the wire connecting portion; a second accommodating portion which is continuous with the first accommodating portion to accommodate the electric contact portion and which is smaller in diameter than the first accommodating portion; a stepped surface formed between the first and second accommodating portions (15, 16); a flange portion is provided which projects from an outer peripheral surface of the wire connecting portion so as to contact the stepped surface; and a sleeve member is provided, said sleeve member being formed into a cylindrical shape which is C-shaped in cross section, a first accommodating portion for accommodating the wire connecting portion; a second accommodating portion which is continuous with the first accommodating portion to accommodate the electric contact portion and which is smaller in diameter than the first accommodating portion; a stepped surface formed between the first and second accommodating portions (15, 16); a flange portion is provided which projects from an outer peripheral surface of the wire connecting portion so as to contact the stepped surface; and a sleeve member is provided, said sleeve member being formed into a cylindrical shape which is C-shaped in cross section, characterized in that: a rear holder is provided which is fitted at an end portion of the connector housing on an opposite side of the fitting portion; and the sleeve member is provided between the flange portion and the rear holder so as to be accommodated in the first accommodating portion. a rear holder is provided which is fitted at an end portion of the connector housing on an opposite side of the fitting portion; and the sleeve member is provided between the flange portion and the rear holder so as to be accommodated in the first accommodating portion.