Electrical connector for signal input/output

Provided is a signal input-output connector device functioning as a plug connector device constituting a USB Type-C connector device, capable of avoiding effectively a situation wherein an impedance mismatch arises between a plurality of transmitting cables and a plurality of contacts. The invention comprises: a first contact assembly 22 equipped with a first insulation base body 21 supporting a plurality of first contacts 20 and provided with a plurality of first signal transmitting routes, each having a cable connection terminal whereto a transmitting cable 11 is connected, and a contact connection terminal whereto, among the plurality of first contacts 20, the corresponding contact is connected by being fixed thereon; and a second contact assembly 25 equipped with a second insulation base body 24 supporting a plurality of second contacts 23 and provided with a plurality of second signal transmitting routes, each having a cable connection terminal whereto a transmitting cable 11 is connected, and a contact