Indoor device for an air conditioner

An indoor device for an air conditioner, comprising:

• a heat exchanger mounting panel in which an orifice to pass air therethrough is formed;
• a centrifugal fan to inhale air in a shaft direction through the orifice and discharge the air in a radial direction;
• a motor to rotate the centrifugal fan;
• and
• a case to fix the motor and couple the motor to the panel, wherein the centrifugal fan comprises a hub portion to couple to a rotational shaft of the motor and a blade portion, a first side of a plurality of blades of which is fixed to the hub portion in a state in which the plurality of blades extends in a direction away from the rotational axis with a predetermined gap therebetween, and wherein a first magnetic substance and a second magnetic substance that generate a repulsive force are respectively disposed at a first surface, which is a surface opposite to a surface to which the plurality of blades is fixed in the hub portion and a second surface opposite to the first surface in the case.