An anesthesia adaptor for stereotaxic systems is a device used to connect an anesthesia machine to a stereotaxic frame, allowing for the administration of anesthetic gases to small animals (such as mice or rats) during surgical procedures. The adaptor provides a connection point between the anesthesia machine and the stereotaxic frame, allowing for the delivery of anesthetic gases to the animal while maintaining the accuracy and stability of the stereotaxic frame.