A connector module comprising: a terminal module including a center conductor, a tubular conductive shell and a tubular insulator holder; a shield case and a non-conductive connector case; wherein the center conductor is designed as linear-shaped center conductor for signal transmission having one end for electrically connecting to a camera module and the other end for electrically connecting to a cable, the tubular insulator holder having a through hole at a center thereof for allowing insertion of the center conductor therethrough, the holder being configured to cover a center portion of the center conductor with respect to its extending direction and to hold the center conductor, and the tubular conductive shell being configured to cover a radial outer side of the insulator holder; the shield case being provided as a bottomed tubular conductive case and configured to shield an inner space of the shield case against electromagnetic wave propagated in an outer space of the shield case; and the non-conductive connector case having a cylindrical space enclosing the terminal module and housing the terminal module and the shield case; the shield case including a bottom portion extending perpendicular to a first direction along the extending direction of the center conductor and a side wall portion bent from a circumference of the bottom portion and extending along the first direction; the bottom portion including an opening portion through which the terminal module extends, characterized in that the bottom portion further includes a protruding portion bent from an edge of the opening portion and protruding in a cylindrical form along the first direction; the terminal module being joined to the shield case with an outer circumferential face of the conductive shell and an inner circumferential face of the protruding portion being placed in face contact with each other, an inner circumferential face of the connector case forming the cylindrical space includes an engaging pawl that protrudes on a radial inner side from the inner circumferential face and provides an elastic force along a radial direction; an outer circumferential face of the conductive shell includes an engaging recessed portion in which the engaging pawl engages; and engagement between the engaging pawl and the engaging recessed portion restricts movement of the terminal module along the first direction relative to the connector case and retains the terminal module to the connector case. a terminal module including a center conductor, a tubular conductive shell and a tubular insulator holder; a shield case and a non-conductive connector case; wherein the center conductor is designed as linear-shaped center conductor for signal transmission having one end for electrically connecting to a camera module and the other end for electrically connecting to a cable, the tubular insulator holder having a through hole at a center thereof for allowing insertion of the center conductor therethrough, the holder being configured to cover a center portion of the center conductor with respect to its extending direction and to hold the center conductor, and the tubular conductive shell being configured to cover a radial outer side of the insulator holder; the center conductor is designed as linear-shaped center conductor for signal transmission having one end for electrically connecting to a camera module and the other end for electrically connecting to a cable, the tubular insulator holder having a through hole at a center thereof for allowing insertion of the center conductor therethrough, the holder being configured to cover a center portion of the center conductor with respect to its extending direction and to hold the center conductor, and the tubular conductive shell being configured to cover a radial outer side of the insulator holder; the shield case being provided as a bottomed tubular conductive case and configured to shield an inner space of the shield case against electromagnetic wave propagated in an outer space of the shield case; and the non-conductive connector case having a cylindrical space enclosing the terminal module and housing the terminal module and the shield case; the shield case including a bottom portion extending perpendicular to a first direction along the extending direction of the center conductor and a side wall portion bent from a circumference of the bottom portion and extending along the first direction; the bottom portion including an opening portion through which the terminal module extends, characterized in that the bottom portion further includes a protruding portion bent from an edge of the opening portion and protruding in a cylindrical form along the first direction; the terminal module being joined to the shield case with an outer circumferential face of the conductive shell and an inner circumferential face of the protruding portion being placed in face contact with each other, an inner circumferential face of the connector case forming the cylindrical space includes an engaging pawl that protrudes on a radial inner side from the inner circumferential face and provides an elastic force along a radial direction; an outer circumferential face of the conductive shell includes an engaging recessed portion in which the engaging pawl engages; and engagement between the engaging pawl and the engaging recessed portion restricts movement of the terminal module along the first direction relative to the connector case and retains the terminal module to the connector case.