A connector having a joint with a limited range of motion, the connector comprising: a connection connector including a connection signal pin, a connection dielectric surrounding the connection signal pin, and a connection ground electrically insulated from the connection signal pin by the connection dielectric; and a first fixed connector into which one side of the connection connector is inserted and which allows a joint of the connection connector to move on the basis of the inserted one side of the connection connector, wherein the connection ground includes: a connection protruding portion formed so that one end of the connection ground protrudes outward; a connection limiting portion which is adjacent to the connection protruding portion and has a thickness smaller than a thickness of the connection protruding portion; a connection elastic portion which is adjacent to the connection limiting portion and has a thickness smaller than a thickness of the connection limiting portion; and a plurality of connection slits which are formed along a circumference of the connection protruding portion and extend from one end of the connection connector in a longitudinal direction of the connection connector so that the connection protruding portion, the connection limiting portion, and the connection elastic portion are separated into a plurality of pieces; wherein the first fixed connector includes a first ground forming the inner side of the first fixed connector into which the one side of the connection connector is inserted; characterized in that the first ground includes: a limiting support portion which has a vertical surface protruding toward the inner side of the first fixed connector at a position corresponding to the connection limiting portion and an inclined portion along which a diameter of a space into which the connection connector is inserted gradually narrows downward; and in that the connection limiting portion comes in contact with the limiting support portion and limits a range of motion of the joint of the connection connector. a connection connector including a connection signal pin, a connection dielectric surrounding the connection signal pin, and a connection ground electrically insulated from the connection signal pin by the connection dielectric; and a first fixed connector into which one side of the connection connector is inserted and which allows a joint of the connection connector to move on the basis of the inserted one side of the connection connector, wherein the connection ground includes: a connection protruding portion formed so that one end of the connection ground protrudes outward; a connection limiting portion which is adjacent to the connection protruding portion and has a thickness smaller than a thickness of the connection protruding portion; a connection elastic portion which is adjacent to the connection limiting portion and has a thickness smaller than a thickness of the connection limiting portion; and a plurality of connection slits which are formed along a circumference of the connection protruding portion and extend from one end of the connection connector in a longitudinal direction of the connection connector so that the connection protruding portion, the connection limiting portion, and the connection elastic portion are separated into a plurality of pieces; wherein the first fixed connector includes a first ground forming the inner side of the first fixed connector into which the one side of the connection connector is inserted; characterized in that the first ground includes: a limiting support portion which has a vertical surface protruding toward the inner side of the first fixed connector at a position corresponding to the connection limiting portion and an inclined portion along which a diameter of a space into which the connection connector is inserted gradually narrows downward; and in that the connection limiting portion comes in contact with the limiting support portion and limits a range of motion of the joint of the connection connector. a connection protruding portion formed so that one end of the connection ground protrudes outward; a connection limiting portion which is adjacent to the connection protruding portion and has a thickness smaller than a thickness of the connection protruding portion; a connection elastic portion which is adjacent to the connection limiting portion and has a thickness smaller than a thickness of the connection limiting portion; and a plurality of connection slits which are formed along a circumference of the connection protruding portion and extend from one end of the connection connector in a longitudinal direction of the connection connector so that the connection protruding portion, the connection limiting portion, and the connection elastic portion are separated into a plurality of pieces; wherein the first fixed connector includes a first ground forming the inner side of the first fixed connector into which the one side of the connection connector is inserted; characterized in that the first ground includes: a limiting support portion which has a vertical surface protruding toward the inner side of the first fixed connector at a position corresponding to the connection limiting portion and an inclined portion along which a diameter of a space into which the connection connector is inserted gradually narrows downward; and in that the connection limiting portion comes in contact with the limiting support portion and limits a range of motion of the joint of the connection connector.