A connector for providing a coaxial connection between an external coaxial cable and a circuit board provided in a separated housing located on a front side of the connector, comprising: a box-like connector housing to be attached to the separated housing located on the front side of the connector, the connector housing including a rear plate, a wall portion extending from an outer edge of the rear plate toward the front side and an engaging portion which is formed on a rear side surface of the rear plate and is configured to be engaged with the external coaxial cable; a thin wire coaxial cable for providing the coaxial connection between the external coaxial cable 2. when engaged with the engaging portion of the connector housing and the circuit board provided in the separated housing, the thin wire coaxial cable including a core wire and a metal shell provided concentrically with the core wire; and contact pin configured to be passed through the rear plate of the connector housing so that one end portion of the contact pin is located on the front side of the rear plate and the other end portion of the contact pin is located on a rear side of the rear plate, the other end portion of the contact pin is configured to be electrically connected to a core wire of the external coaxial cable, and the core wire of the thin wire coaxial cable has one end portion to be connected to the circuit board and the other end portion soldered to the one end portion of the contact pin, characterized in that the connector further comprises a shield member which is provided in an inner space of the connector housing defined by the rear plate and the wall portion of the connector housing and electrically connected to the shell of the thin wire coaxial cable, wherein the shield member has a holding mechanism for holding the thin wire coaxial cable. a box-like connector housing to be attached to the separated housing located on the front side of the connector, the connector housing including a rear plate, a wall portion extending from an outer edge of the rear plate toward the front side and an engaging portion which is formed on a rear side surface of the rear plate and is configured to be engaged with the external coaxial cable; a thin wire coaxial cable for providing the coaxial connection between the external coaxial cable 2. when engaged with the engaging portion of the connector housing and the circuit board provided in the separated housing, the thin wire coaxial cable including a core wire and a metal shell provided concentrically with the core wire; and contact pin configured to be passed through the rear plate of the connector housing so that one end portion of the contact pin is located on the front side of the rear plate and the other end portion of the contact pin is located on a rear side of the rear plate, the other end portion of the contact pin is configured to be electrically connected to a core wire of the external coaxial cable, and the core wire of the thin wire coaxial cable has one end portion to be connected to the circuit board and the other end portion soldered to the one end portion of the contact pin, characterized in that the connector further comprises a shield member which is provided in an inner space of the connector housing defined by the rear plate and the wall portion of the connector housing and electrically connected to the shell of the thin wire coaxial cable, wherein the shield member has a holding mechanism for holding the thin wire coaxial cable.