An electromagnetic relay having a high positioning accuracy of a movable iron piece and little variation in operating characteristics. A pair of upper and lower rotating shaft convex portions are provided at one end of a movable iron piece along the same shaft center. The pair of upper and lower rotating shaft convex portions are rotatably supported by a base and a spool of an electromagnetic block mounted on the base respectively. A movable contact piece is driven by the movable iron piece rotated by magnetization or demagnetization of the electromagnetic block to open or close a contact. One end of the spool has a shaft hole in which the upper rotating shaft convex portion of the movable iron piece is inserted.