A connector module comprising: a terminal module having a central conductor that has a straight linear portion and is capable of transmitting a signal, an insulator holder that has, in a center, a through-hole for passage of the straight linear portion, and that is shaped as a tube and supports the central conductor while covering at least a portion of the straight linear portion, and a conductive shell that is shaped as a tube and covers an outward diameter direction side of the insulator holder; and a shield case that is electrically conductive, is shaped as a bottomed tube capable of being engaged with the terminal module, and shields an interior space from electromagnetic waves that propagate in an exterior space around the shield case, characterized in that the shield case has a bottom portion that extends orthogonal to a first direction that conforms to an extending direction of the straight linear portion, and a side wall portion that is bent from a periphery of the bottom portion and extends along the first direction, the bottom portion has an opening portion for passage of the terminal module, and a plurality of elastic portions that are capable of elastic deformation and are bent from an edge portion of the opening portion and project in the first direction, the shield case is engaged with the conductive shell of the terminal module with use of the elastic portions, and an annular recession portion is formed in a portion of the conductive shell that is engaged to the elastic portions, the annular recession portion being in contact with and electrically connected to the elastic portions. a terminal module having a central conductor that has a straight linear portion and is capable of transmitting a signal, an insulator holder that has, in a center, a through-hole for passage of the straight linear portion, and that is shaped as a tube and supports the central conductor while covering at least a portion of the straight linear portion, and a conductive shell that is shaped as a tube and covers an outward diameter direction side of the insulator holder; and a central conductor that has a straight linear portion and is capable of transmitting a signal, an insulator holder that has, in a center, a through-hole for passage of the straight linear portion, and that is shaped as a tube and supports the central conductor while covering at least a portion of the straight linear portion, and a conductive shell that is shaped as a tube and covers an outward diameter direction side of the insulator holder; and a shield case that is electrically conductive, is shaped as a bottomed tube capable of being engaged with the terminal module, and shields an interior space from electromagnetic waves that propagate in an exterior space around the shield case, characterized in that the shield case has a bottom portion that extends orthogonal to a first direction that conforms to an extending direction of the straight linear portion, and a side wall portion that is bent from a periphery of the bottom portion and extends along the first direction, the bottom portion has an opening portion for passage of the terminal module, and a plurality of elastic portions that are capable of elastic deformation and are bent from an edge portion of the opening portion and project in the first direction, the shield case is engaged with the conductive shell of the terminal module with use of the elastic portions, and an annular recession portion is formed in a portion of the conductive shell that is engaged to the elastic portions, the annular recession portion being in contact with and electrically connected to the elastic portions.