To prevent deterioration of contact reliability between a terminal metal fitting and a circuit board.

The connector 10 is composed of a connector housing 11 made of synthetic resin and a terminal metal fitting 15 which is fixed with the connector housing 11 and can be connected with a circuit board 40 to be assembled in a case 30. By pinching an engagement part 34 provided in the case 30 between a plurality of holding parts 19A, 19B, 19C formed in the connector housing 11, the connector housing 11 is assembled in the case 30. On the opposing surface to the engagement part 34 in the plurality of holding parts 19A, 19B, 19C, there are formed protruded parts 22A, 22B, 22C, which are protruded toward the engagement part 34 and come in contact with the engagement part 34 in a plastic-deformed state in a state of being pinched between the plurality of holding parts 19A, 19B, 19C.