An electromagnetic connecting device comprising: a rotary member rotatable around an axis (C); an armature arranged in an axial direction parallel to the axis (C) with respect to the rotary member ; a leaf spring including a base end portion fixed to the rotary member , and a free end portion connected to the armature ; an electromagnetic coil ; an attracting member arranged on an opposite side of the rotary member across the armature , accommodating the electromagnetic coil , and configured to attract the armature by moving the armature in the axial direction against a spring force of the leaf spring when an electric current is supplied to the electromagnetic coil ; and an anti-vibration member formed by an elastic material, wherein the leaf spring includes: a moving portion that includes the free end portion and moves in the axial direction together with movement of the armature ; and a non-moving portion that includes the base end portion and does not move in the axial direction, characterized in that the anti-vibration member is fixed to the moving portion of the leaf spring , and the anti-vibration member includes: a stopper that comes in contact with one of the rotary member and the non-moving portion of the leaf spring from a side of the armature ; and a damper that comes in contact with the armature from a side of the rotary member . a rotary member rotatable around an axis (C); an armature arranged in an axial direction parallel to the axis (C) with respect to the rotary member ; a leaf spring including a base end portion fixed to the rotary member , and a free end portion connected to the armature ; an electromagnetic coil ; an attracting member arranged on an opposite side of the rotary member across the armature , accommodating the electromagnetic coil , and configured to attract the armature by moving the armature in the axial direction against a spring force of the leaf spring when an electric current is supplied to the electromagnetic coil ; and an anti-vibration member formed by an elastic material, wherein the leaf spring includes: a moving portion that includes the free end portion and moves in the axial direction together with movement of the armature ; and a non-moving portion that includes the base end portion and does not move in the axial direction, characterized in that the anti-vibration member is fixed to the moving portion of the leaf spring , and the anti-vibration member includes: a stopper that comes in contact with one of the rotary member and the non-moving portion of the leaf spring from a side of the armature ; and a damper that comes in contact with the armature from a side of the rotary member . a moving portion that includes the free end portion and moves in the axial direction together with movement of the armature ; and a non-moving portion that includes the base end portion and does not move in the axial direction, characterized in that the anti-vibration member is fixed to the moving portion of the leaf spring , and the anti-vibration member includes: a stopper that comes in contact with one of the rotary member and the non-moving portion of the leaf spring from a side of the armature ; and a damper that comes in contact with the armature from a side of the rotary member . a stopper that comes in contact with one of the rotary member and the non-moving portion of the leaf spring from a side of the armature ; and a damper that comes in contact with the armature from a side of the rotary member . <EOS>