Air conditioner

An air conditioner, comprising:

• a case that forms an exterior of the air conditioner;
• a panel having an air inlet and disposed at one side of the case;
• an electric dust collector that collects foreign substances introduced through the air inlet;
• and
• a high voltage applying device electrically connected to the electric dust collector, wherein the electric dust collector includes:
• a discharge electrode that extends toward the air inlet and charges particles contained in air introduced through the air inlet;
• and
• an electrode holder that supports the discharge electrode so that an angle formed between an extension direction of the discharge electrode and a flow direction of air introduced through the air inlet is changeable, wherein the discharge electrode comprises:
• a needle that receives a high voltage from the high voltage applying device;
• and
• a pair of keys that supports the needle, wherein the pair of keys include a first key and a second key, wherein the first key and the second key have a same shape and extend in opposite directions, and wherein the needle is obliquely fixed to the electrode holder.