To provide a connector arranged in a relatively small space so as to reduce space for equipment and costs and protected from the unnecessary electric breakdown of a card circuit and a portable telephone set using this connector.

This connector is provided with a first contact 2 having elasticity so as to be protruded from an insulator provided in a location for loading an article to be attached and moved in a first direction and a second contact 4 provided in a position opposite one end of the first contact 2 and the first direction for switching ON/OFF power for a detecting circuit for detecting whether the article is attached by attaching/detaching the article so as to contact with or separate from the first contact 2.