Electromagnetic relay

An electromagnetic relay includes an electromagnetic part, a movable iron piece, a contact driving part, a contact which is opened and closed by driving the contact driving part with a card disposed between the movable iron piece and the contact driving part. Particularly, the card is disposed between the insulating wall and the contact driving part, a driving projection projected onto an inward surface side opposed to the insulating wall of the card is inserted in and projected from a manipulation hole made in the insulating wall, and the driving projection of the card is pressed by the movable iron piece that is operated based on excitation and demagnetization of the electromagnetic part.