A pressure swing adsorption-type oxygen concentrator provided with an adsorption bed filled with an adsorbent selectively adsorbing nitrogen relative to oxygen and a compressed air supply device configured to supply compressed air to the adsorption bed, adsorbing and eliminating nitrogen in raw material air to produce unadsorbed oxygen, the concentrator comprising: a flow rate setting device to supply the oxygen gas at a predetermined flow rate, and an oxygen concentration sensor configured to detect the concentration of the oxygen gas produced by the oxygen concentrator, wherein the oxygen concentrator is configured to increase or decrease the supply airflow volume of the compressed air supply device based on the detected oxygen concentration value to maintain the oxygen concentration at a predetermined concentration, the pressure swing adsorption-type oxygen concentrator being characterized in that it further comprises a temperature sensor configured to measure the temperature of the environmental air supplied to the oxygen concentrator, and a temperature dependent control device configured to control the supply airflow volume of the compressed air supply device based on the value detected by the temperature sensor when the value detected by the temperature sensor is outside a predetermined range, wherein the temperature dependent control device is either configured to perform a control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the range during running of the oxygen concentrator; or the temperature dependent control device is configured to perform a control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the range and the supply airflow volume is lower than a predetermined airflow volume during running of the oxygen concentrator. a flow rate setting device to supply the oxygen gas at a predetermined flow rate, and an oxygen concentration sensor configured to detect the concentration of the oxygen gas produced by the oxygen concentrator, wherein the oxygen concentrator is configured to increase or decrease the supply airflow volume of the compressed air supply device based on the detected oxygen concentration value to maintain the oxygen concentration at a predetermined concentration, the pressure swing adsorption-type oxygen concentrator being characterized in that it further comprises a temperature sensor configured to measure the temperature of the environmental air supplied to the oxygen concentrator, and a temperature dependent control device configured to control the supply airflow volume of the compressed air supply device based on the value detected by the temperature sensor when the value detected by the temperature sensor is outside a predetermined range, wherein the temperature dependent control device is either configured to perform a control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the range during running of the oxygen concentrator; or the temperature dependent control device is configured to perform a control without allowing the supply airflow volume of the compressed air supply device to decrease when the temperature sensor detects a value lower than a predetermined lower temperature limit of the range and the supply airflow volume is lower than a predetermined airflow volume during running of the oxygen concentrator.