A first connector 10 pertaining to the present disclosure is to be attached to a connection object 40 which has multiple contact lines 42 exposed at a tip part of the connection object 40 and a ground part 43 partially covering the contact lines 42. The first connector 10 comprises: a first insulator 20 which has a holding part 24 for holding, with the tip part of the connection object accommodated therein, the connection object 40; and a first metal member 30 which is attached to the first insulator 20, wherein the first metal member 30 has a first base part 31 which is formed in a plate-like shape, a first contact part 32 which extends toward the tip part from the first base part 31 and is in contact with the contact lines 42, and a second contact part 33 which is positioned on the opposite side of the tip part from the first contact part 32 and is in contact with the ground part 43.