PURPOSE: To provide the draining device of an air-conditioner, which has structure wherein draining operation may be performed in one action, has no fear of water leakage occurring during draining operation and the draining device is prevented from being missed.

CONSTITUTION: A draining device comprises a cylinder part 16a and a supporter 16b formed in a spherical shape to the tip of the cylinder part 16a. The supporter 16b is slidably held in a drain hole 13 of a drain pan 11. When the cylinder part 16a is slid such that it is brought into an approximately vertical state, the drain hole 13 of the drain pan 11 is communicated to the interior of the cylinder part 16a through the hole of the supporter 16b. When the cylinder part 16a is slid such that it is inclined in a lateral direction, the drain hole 13 of the drain pan 11 is closed with the supporter l6b.