A shield connector structure for connecting a shield wire to a connection object by inserting the shield wire into an insertion hole of the connection object from one side to the other side, the shield wire including a conductor, an inner insulation coating, a shield portion, and an outer insulation coating, the shield connector structure comprising: a connection member in which the shield wire is inserted and which is fixed to one side of the connection object; a first seal member that is interposed between an inner surface of the connection member and an outer surface of the outer insulation coating of the shield wire; a second seal member that is interposed between the connection member and an inner surface of the insertion hole of the connection object; and an annular fixing member that fixes the shield portion of the shield wire to the connection member, wherein the connection member is formed by a metal material having conductivity, the connection member includes: a connection member body that is fixed to the connection object in contact with one surface of the connection object; a first cylindrical extension portion that extends from the connection member body to the inside of the insertion hole of the connection object; and a second cylindrical extension portion that extends from the first extension portion to the other side and has an outer diameter smaller than an outer diameter of the first extension portion, characterised by the second cylindrical extension portion including, a concave groove portion formed along a circumferential direction such that the concave groove portion is recessed from an outer peripheral surface thereof and by, the fixing member including a strip-shaped band portion in which a width dimension thereof is smaller than the concave groove portion, and the shield portion of the shield wire is fixed to the concave groove portion of the second extension portion by the band portion, and the shield portion and the connection object are electrically connected through the connection member. a connection member in which the shield wire is inserted and which is fixed to one side of the connection object; a first seal member that is interposed between an inner surface of the connection member and an outer surface of the outer insulation coating of the shield wire; a second seal member that is interposed between the connection member and an inner surface of the insertion hole of the connection object; and an annular fixing member that fixes the shield portion of the shield wire to the connection member, wherein the connection member is formed by a metal material having conductivity, the connection member includes: a connection member body that is fixed to the connection object in contact with one surface of the connection object; a first cylindrical extension portion that extends from the connection member body to the inside of the insertion hole of the connection object; and a second cylindrical extension portion that extends from the first extension portion to the other side and has an outer diameter smaller than an outer diameter of the first extension portion, characterised by the second cylindrical extension portion including, a concave groove portion formed along a circumferential direction such that the concave groove portion is recessed from an outer peripheral surface thereof and by, the fixing member including a strip-shaped band portion in which a width dimension thereof is smaller than the concave groove portion, and the shield portion of the shield wire is fixed to the concave groove portion of the second extension portion by the band portion, and the shield portion and the connection object are electrically connected through the connection member. a connection member body that is fixed to the connection object in contact with one surface of the connection object; a first cylindrical extension portion that extends from the connection member body to the inside of the insertion hole of the connection object; and a second cylindrical extension portion that extends from the first extension portion to the other side and has an outer diameter smaller than an outer diameter of the first extension portion, characterised by the second cylindrical extension portion including, a concave groove portion formed along a circumferential direction such that the concave groove portion is recessed from an outer peripheral surface thereof and by, the fixing member including a strip-shaped band portion in which a width dimension thereof is smaller than the concave groove portion, and the shield portion of the shield wire is fixed to the concave groove portion of the second extension portion by the band portion, and the shield portion and the connection object are electrically connected through the connection member.