An electromagnetic contactor, including: a contact mechanism including a pair of fixed contacts disposed maintaining a predetermined interval and a movable contact disposed so as to be connectable to and detachable from the pair of fixed contacts; and an electromagnet unit that drives the movable contact, the electromagnet unit including: a magnetic yoke enclosing a plunger drive portion; a movable plunger whose leading end protrudes through an aperture formed in the magnetic yoke and on whose protruding end side is formed a peripheral flange portion; a permanent magnet disposed between said magnetic yoke and an auxiliary yoke; a movement regulating portion that regulates movement of the peripheral flange portion of the movable plunger in an engaged position and released position of the contact mechanism; characterised in that there is provided a contact noise suppression member (140, 240) that suppresses contact noise when the peripheral flange portion of the movable plunger comes into contact with the movement regulating portion, and wherein said auxiliary yoke is fixed to the upper end surface of the permanent magnet, and the peripheral flange portion of the movable plunger is opposed by the lower surface of the auxiliary yoke, so that the stroke of said movable plunger is regulated by the thickness of said permanent magnet. a contact mechanism including a pair of fixed contacts disposed maintaining a predetermined interval and a movable contact disposed so as to be connectable to and detachable from the pair of fixed contacts; and an electromagnet unit that drives the movable contact, the electromagnet unit including: a magnetic yoke enclosing a plunger drive portion; a movable plunger whose leading end protrudes through an aperture formed in the magnetic yoke and on whose protruding end side is formed a peripheral flange portion; a permanent magnet disposed between said magnetic yoke and an auxiliary yoke; a movement regulating portion that regulates movement of the peripheral flange portion of the movable plunger in an engaged position and released position of the contact mechanism; characterised in that there is provided a contact noise suppression member (140, 240) that suppresses contact noise when the peripheral flange portion of the movable plunger comes into contact with the movement regulating portion, and wherein said auxiliary yoke is fixed to the upper end surface of the permanent magnet, and the peripheral flange portion of the movable plunger is opposed by the lower surface of the auxiliary yoke, so that the stroke of said movable plunger is regulated by the thickness of said permanent magnet. a magnetic yoke enclosing a plunger drive portion; a movable plunger whose leading end protrudes through an aperture formed in the magnetic yoke and on whose protruding end side is formed a peripheral flange portion; a permanent magnet disposed between said magnetic yoke and an auxiliary yoke; a movement regulating portion that regulates movement of the peripheral flange portion of the movable plunger in an engaged position and released position of the contact mechanism; characterised in that there is provided a contact noise suppression member (140, 240) that suppresses contact noise when the peripheral flange portion of the movable plunger comes into contact with the movement regulating portion, and wherein said auxiliary yoke is fixed to the upper end surface of the permanent magnet, and the peripheral flange portion of the movable plunger is opposed by the lower surface of the auxiliary yoke, so that the stroke of said movable plunger is regulated by the thickness of said permanent magnet.