The connector includes: a male connector; a female connector which fits to the male connector when the male connector enters inside the female connector; a lever which is rotatably attached to one of the male connector and the female connector, and rotates so as to allow the male connector and the female connector to approach or leave each other; and a pressing projection which projects from one of the lever and the female connector toward the other of the lever and the female connector, wherein when the male connector and the female connector fit to each other, the pressing projection presses the female connector in a direction in which the male connector and the female connector adhere to each other. The male and female connectors can be easily securely fit to each other, and the male and female connectors after fitting can be maintained watertight to each other.