The present invention provides a connector includes a housing having a fitting opening for the object to be connected, signal contacts retained in the housing in parallel disposition, a pressure member capable of pressing the signal contacts, and power source contacts. The power source contacts are retained besides the signal contacts, have a thickness dimension larger than that of the signal contacts and are to be pressed by the pressure member together with the signal contacts. The power source contacts include a power source contact with a fixation function, having not only the power source connection function but also a function of temporally fixing the object to be connected at a correct insertion position with respect to the signal contacts as well as a function of clamping and fixing the object to be connected in a state of being pressed by the pressure member.