Electric connector

The contact state of a signal transmission medium and contact members is enabled to be maintained well by a simple configuration. Medium pressing portions of an actuator, which is subjected to a moving operation so as to electrically connect contact portions of contact members, which are in a multipolar arrangement, and a signal transmission medium (FPC, FFC, or the like) to each other, are disposed at the same positions as the contact portions of the contact members in the direction of the multipolar arrangement. The medium pressing portions of the actuator at the positions directly opposed to the contact portions of the contact members are configured to press the signal transmission medium when the actuator is moved to a working position so that the contact pressures applied from the medium pressing portions of the actuator to the signal transmission medium are reliably applied to the contact portions of the contact members without being dispersed.