A screw tightening type connector having a female connector and a male connector fitted in the female connector. The female connector is provided with a female screw body, while a male screw body is provided on the male connector. The male connector is screwed into the female screw body and is tightened whereby the female connector and the male connector are fitted in each other. A rotational-force imparting section is provided for imparting a rotational force to the male screw body. The rotational-force imparting section has a rotary shaft extending in a direction intersected with a fitting direction of the male connector into the female connector. A rotational-force transmitting section is provided for converting the rotational force from the rotational-force imparting section to a rotational force in a direction intersected with the rotary shaft to transmit the rotational force to the male screw body.