The utility model provides a gas venting switching valve of an air bed, which can make a single tube air bed have a function of deflation through a design of a accommodating chamber, a regulating valve body and an adjusting knob, and can be borrowed when speeding up the deflation speed The air release speed of the regulator valve body is switched by the adjustment knob.本新型提供一種氣墊床之洩氣切換閥，透過一容置腔、一調節閥主體以及一調節旋鈕的設計，可讓單管氣墊床具有洩氣的功能，並且，當需加快洩氣速度時，可藉由該調節旋鈕切換該調節閥主體的洩氣速度。
