An oxygen-supplying respirator requiring no electric power is provided. The oxygen-supplying respirator, which is driven not by electricity but by the oxygen supply pressure at an external oxygen supply end, includes an oxygen supply valve unit in communication with the oxygen supply end so as to turn on and off oxygen output therefrom. An inhalation/exhalation time setting valve unit is in communication between the oxygen supply valve unit and the oxygen supply end, receives the oxygen continuously supplied from the oxygen supply end, and outputs oxygen to the oxygen supply valve unit intermittently. Thus, the oxygen supply valve unit is driven to turn on the oxygen supply end intermittently and thereby enable intermittent oxygen output. The respirator can supply oxygen to a patient where there is no electricity.
