A contact switching device comprising: an electromagnetic unit; a holder mounted in the electromagnetic unit; a movable shaft having one end inserted through the inside of the holder and the other end inserted through the inside of the electromagnetic unit, and supported reciprocatably in a direction of an axis center; a movable contact piece provided at the one end of the movable shaft in the holder and housed in the holder, while having a pair of movable contacts disposed on the front surface on the opposite side to the electromagnetic unit in the axis center direction of the movable shaft; a movable yoke disposed on the rear surface of the movable contact piece on the electromagnetic unit side in the axis center direction of the movable shaft, and assembled to the one end of the movable shaft in the holder; a pair of fixed contacts disposed in the holder and facing the pair of movable contacts in a contactable and separable manner; and a fixed yoke located between the pair of fixed contacts, and supported as a result of placing both ends thereof in a longitudinal direction that intersects with the axis center direction of the movable shaft and intersects with a longitudinal direction of the movable contact piece, wherein, at the time of excitation of the electromagnetic unit, the movable shaft moves in a direction from the electromagnetic unit to the holder along the axis center direction, a magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the pair of movable contacts coming into contact with the pair of fixed contacts, and the movable yoke is magnetically attracted to the fixed yoke; characterized in that a position regulating plate formed of a metal material is provided in a slit of the holder such as - to be pressed to be in contact with the movable yoke in the holder and thereby to regulate the position of the movable yoke, - to make the pressing force act on the movable contact piece via the movable yoke, and - to prevent that the movable contact piece and the movable yoke come into direct contact with the holder. an electromagnetic unit; a holder mounted in the electromagnetic unit; a movable shaft having one end inserted through the inside of the holder and the other end inserted through the inside of the electromagnetic unit, and supported reciprocatably in a direction of an axis center; a movable contact piece provided at the one end of the movable shaft in the holder and housed in the holder, while having a pair of movable contacts disposed on the front surface on the opposite side to the electromagnetic unit in the axis center direction of the movable shaft; a movable yoke disposed on the rear surface of the movable contact piece on the electromagnetic unit side in the axis center direction of the movable shaft, and assembled to the one end of the movable shaft in the holder; a pair of fixed contacts disposed in the holder and facing the pair of movable contacts in a contactable and separable manner; and a fixed yoke located between the pair of fixed contacts, and supported as a result of placing both ends thereof in a longitudinal direction that intersects with the axis center direction of the movable shaft and intersects with a longitudinal direction of the movable contact piece, wherein, at the time of excitation of the electromagnetic unit, the movable shaft moves in a direction from the electromagnetic unit to the holder along the axis center direction, a magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the pair of movable contacts coming into contact with the pair of fixed contacts, and the movable yoke is magnetically attracted to the fixed yoke; characterized in that a position regulating plate formed of a metal material is provided in a slit of the holder such as - to be pressed to be in contact with the movable yoke in the holder and thereby to regulate the position of the movable yoke, - to make the pressing force act on the movable contact piece via the movable yoke, and - to prevent that the movable contact piece and the movable yoke come into direct contact with the holder. - to be pressed to be in contact with the movable yoke in the holder and thereby to regulate the position of the movable yoke, - to make the pressing force act on the movable contact piece via the movable yoke, and - to prevent that the movable contact piece and the movable yoke come into direct contact with the holder.