A connector including: a terminal fitting (10A, 10B) connected to an end of an electric wire, a housing including a terminal accommodating chamber (26, 36) configured to accommodate the terminal fitting (10A, 10B), temperature sensors (100A, 100B) being thermistors each having a thermistor element for detecting a temperature, and a heat retaining cover (70, 90), wherein the heat retaining cover (70, 90) is configured to: be attached to the housing such that the heat retaining cover (70, 90) covers a rear end portion of the housing; and to retain heat inside the terminal accommodating chamber (26, 36), wherein the heat retaining cover (70, 90) has an electric wire guiding out portion (75, 97) through which the electric wire and a detection line drawn out from the terminal accommodating chamber (26, 36) are to be inserted, the temperature sensors (100A, 100B) are attached to the respective terminal fitting (10A, 10B), detection lines respectively connected to an end of the thermistor elements are drawn out from rear ends of the temperature sensors (100A, 100B); characterized in that one of the temperature sensors (100A, 100B) is fixed to an outer surface of an electric wire connection portion of the terminal fitting by a heat shrinkable tube such that the temperature sensor contacts the outer surface of the electric wire connection portion, and the other of the temperature sensors (100A, 100B) is fixed, by means of a sensor holder attached to the housing, to an outer surface of a base portion of an electric wire connection portion in the vicinity of a flange portion of the terminal fitting such that the temperature sensor contacts the outer surface of the base portion of the electric wire connection portion. a terminal fitting (10A, 10B) connected to an end of an electric wire, a housing including a terminal accommodating chamber (26, 36) configured to accommodate the terminal fitting (10A, 10B), temperature sensors (100A, 100B) being thermistors each having a thermistor element for detecting a temperature, and a heat retaining cover (70, 90), wherein the heat retaining cover (70, 90) is configured to: be attached to the housing such that the heat retaining cover (70, 90) covers a rear end portion of the housing; and to retain heat inside the terminal accommodating chamber (26, 36), wherein the heat retaining cover (70, 90) has an electric wire guiding out portion (75, 97) through which the electric wire and a detection line drawn out from the terminal accommodating chamber (26, 36) are to be inserted, the temperature sensors (100A, 100B) are attached to the respective terminal fitting (10A, 10B), detection lines respectively connected to an end of the thermistor elements are drawn out from rear ends of the temperature sensors (100A, 100B); characterized in that one of the temperature sensors (100A, 100B) is fixed to an outer surface of an electric wire connection portion of the terminal fitting by a heat shrinkable tube such that the temperature sensor contacts the outer surface of the electric wire connection portion, and the other of the temperature sensors (100A, 100B) is fixed, by means of a sensor holder attached to the housing, to an outer surface of a base portion of an electric wire connection portion in the vicinity of a flange portion of the terminal fitting such that the temperature sensor contacts the outer surface of the base portion of the electric wire connection portion.