The present invention relates to a gas exchanging apparatus capable of improving the productivity of a semiconductor product and reducing experiment time. When a gas exchanging process is performed, the inner pressure of a sealing container is always monitored and a throttle valve for controlling the amount of gas purged is controlled or the amount of the wind generated from a forced draught fan is controlled to perform the gas exchanging process under a process pressure required by a user. When replacing a specific gas for forming a gas atmosphere in a glove box for an experiment or the sealing container for manufacturing a semiconductor or an OLED, the specific gas can be quickly and stably exchanged. [Reference numerals] (10) Sealing container
