A blood gas analyzer capable of requesting an order for consumables and reagents on the spot as soon as the user notices the replacement time of consumables and lack of reagents when using the blood gas analyzer. Provide a maintenance system. A blood gas analyzer according to the present invention is configured to be able to communicate with a blood gas analyzer installed in a facility such as a hospital via a network by wired communication or wireless communication. A blood gas analyzer maintenance system including a server device, wherein the blood gas analyzer includes a consumables ordering button for selecting consumables and transmitting consumables ordering information. And when the consumables order button is pressed, an ordering email including at least the identification information of the corresponding blood gas analyzer and the consumables ordering information is automatically created, and the server is connected via the network. The electronic mail is configured to be transmitted to a device. [Selection] Figure 3
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