Abstract: The present invention proposes an air bag type brassiere, which uses a small air intake pump operated by pressing to draw external air into air bags imbedded therein so that the user can exactly adjust the air bags to the required size. Moreover, the air bags can be deflated for adjustment or storage by pressing the air relief valve on the air bags. Additionally, a number of exhaust holes are arranged at the places fused by high-frequency wave at the edges of the air bags to radiate heat generated by human body. Thereby, the user will not feel hot and moist.