A compliant pin terminal inserted into a through hole, such as a center hole of a feed-through capacitor or a through hole of a circuit substrate having an electrode at the inner periphery thereof, is mounted into the through hole for electrically connecting with the electrode therein. The pin terminal includes slits, by which linear divided portions and expanded elastic contact portions are formed so that when the body is inserted into the through hole of the capacitor the elastic contact portions come into press-contact with the electrode, thereby obtaining electrical connection with the electrode and mechanical locking by means of the elasticity of each elastic contact portion. A lengthwise pulling force acting on the terminal body is borne by the linear divided portions, but does not act on the elastic portions. Accordingly, an interval between the elastic contact portions opposite to each other resists change, thereby effectively preventing the pin terminal from escaping from the through hole.