A method of manufacturing a housing-integrated board mating connector , the method comprising: preparing a housing of an electrical device, the housing having a housing insertion hole formed therein and a part or the entirety of the housing being made of a conductive metal material; inserting a cylindrical ground gasket into the housing insertion hole ; preparing a dielectric part and signal terminal part assembly in which a dielectric part surrounds a signal terminal part ; and inserting the dielectric part and signal terminal part assembly into an inner circumferential surface of the ground gasket , wherein in the inserting of the cylindrical ground gasket into the housing insertion hole , the ground gasket includes: a ground insertion part inserted into the housing insertion hole ; a ground elastic part extending from the ground insertion part to an outside of the housing insertion hole and having three or more slits cut along a circumference thereof to have elasticity; and a ground contact part extending from the ground elastic part and being in contact with a ground electrode of a board , wherein the ground elastic part includes a first elastic portion extending outward from the ground insertion part and a second elastic portion extending inward from the first elastic portion , and the ground contact part extends obliquely in a direction from the second elastic portion toward a center of the housing insertion hole . preparing a housing of an electrical device, the housing having a housing insertion hole formed therein and a part or the entirety of the housing being made of a conductive metal material; inserting a cylindrical ground gasket into the housing insertion hole ; preparing a dielectric part and signal terminal part assembly in which a dielectric part surrounds a signal terminal part ; and inserting the dielectric part and signal terminal part assembly into an inner circumferential surface of the ground gasket , wherein in the inserting of the cylindrical ground gasket into the housing insertion hole , the ground gasket includes: a ground insertion part inserted into the housing insertion hole ; a ground elastic part extending from the ground insertion part to an outside of the housing insertion hole and having three or more slits cut along a circumference thereof to have elasticity; and a ground contact part extending from the ground elastic part and being in contact with a ground electrode of a board , wherein the ground elastic part includes a first elastic portion extending outward from the ground insertion part and a second elastic portion extending inward from the first elastic portion , and the ground contact part extends obliquely in a direction from the second elastic portion toward a center of the housing insertion hole . a ground insertion part inserted into the housing insertion hole ; a ground elastic part extending from the ground insertion part to an outside of the housing insertion hole and having three or more slits cut along a circumference thereof to have elasticity; and a ground contact part extending from the ground elastic part and being in contact with a ground electrode of a board , wherein the ground elastic part includes a first elastic portion extending outward from the ground insertion part and a second elastic portion extending inward from the first elastic portion , and the ground contact part extends obliquely in a direction from the second elastic portion toward a center of the housing insertion hole . <EOS>