Electrical connector

A connector includes a plurality of contacts each having at one end a contact portion adapted to contact a connecting object, at the other end a connection portion to be connected to a substrate or the like, and between the contact and connection portions a fixed portion to be arranged and held in a housing so that the contact portion is displaceable about the fixed portion as a fulcrum in a cantilevered manner relative to the housing arranging and holding the contacts. If the thickness of the housing where the contact portions of the contacts are displaceable is not more than 0.6 to 0.7 mm, the housing is provided with a protrusion formed with a hole to permit the contact portions to be displaceable in the hole, thereby ensuring sufficient contact pressures to obtain stable connection with a mating connector without unintended deformations of the contacts.