Provided is an electromagnetic clutch with which high levels of both magnetic characteristics and noise characteristics can be achieved. An armature 12 which constitutes an electromagnetic clutch 10 of the present embodiment includes an armature laminated plate 14 comprising a first armature plate 20 and a second armature plate 21 that are laminated from a rotor 11 side. The first armature plate 20 comprises the following: a ring-shaped inner ring armature plate 20A that is joined to the radially-inner portion of the second armature plate 21; and a ring-shaped outer ring armature plate 20B that is joined to the radially-outer portion of the second armature plate 21. The thickness of the first armature plate 20 is 1.5-3.0 mm, and the thickness of the second armature plate 21 is 0.5-2.0 mm.