To provide a gas treatment apparatus which can keep the container miniaturized while an efficiency at which the component to be treated is treated can be improved.

A gas treatment apparatus 49 is provided with a liquid collection part 60 formed from a cylindrical part 66 and a hemispherical part 67, the front end part of the cylindrical part 66 is partitioned to serve as an opening 34, and the inner side surface of the hemispherical part 67 is partitioned to serve as a liquid collection surface 71. Additionally, by jetting a treatment liquid and a gas to be treated toward the liquid collection surface 71, the treatment component contained in the treatment liquid and the component to be treated contained in the gas to be treated are brought into contact with each other.