Disclosed is an oxygen concentrator or the like, which is capable of informing the necessity of a required inspection in terms of not only operation time, but also indexes other than the operation time. Specifically disclosed is an oxygen concentrator which is provided with an integrated operation time information generating unit for integrating operation time information to generate the integrated operation time information, a required inspection time determining unit for determining whether or not the integrated operation time information has exceeded required inspection time information, a cumulative used period information generating unit for generating cumulative used period information on the basis of the first operation start time information and operation end time information of the oxygen concentrator, a required inspection cumulative used period information determining unit for determining whether or not the cumulative used period information has exceeded required inspection cumulative used period information, and a required inspection information display determining unit for displaying required inspection information on a display unit when the required inspection time determining unit determines that the integrated operation time information has exceeded the required inspection time information, and/or the required inspection cumulative used period information determining unit determines that the cumulative used period information has exceeded the required inspection cumulative used period information.
