A paint booth that eliminates paint mist from air containing paint mist and volatile organic compounds (VOC) generated within a paint room in a highly-efficient manner is provided.The paint booth includes a collecting chamber that holds booth circulating water and is provided with a forced contact section having curved guide plates. An end section of each of the guide plates is provided with a water surface plate. The water surface plates are made of plate-shaped members and are disposed above the surface of the booth circulating water that serves as collecting water, such that a necessary space between the water surface plates and the water surface is maintained. Preferably, the water surface plates are formed in a flat or corrugated sheet shape.