Glutaminase is a critical enzyme that catalyzes the process of glutaminolysis for energy synthesis. Meanwhile, glutaminase also contributes to the pathological process of various diseases, such as cancer, neurodegenerative diseases, and inflammation. This leads to the discovery of glutaminase inhibitors for therapeutical uses. However, the mechanisms of the beneficial therapeutical effect of glutaminase inhibitors are still unclear. This pilot study aimed to determine the impact of a well-characterized glutaminase inhibitor, compound 968 (C968), on Nrf2 signaling. We performed molecular docking, luciferase assay, and quantitative PCR to determine the activation of Nrf2 and the expression of several Nrf2-related genes. These experiments found that C968 induced the Nrf2 activation and promoted the expression of Nrf2, heme oxygenase-1 (HO-1), and NAD(P)H Quinone Dehydrogenase-1 (NQO-1). All findings provide evidence that Nrf2 activation could be one of the mechanisms contributing to the therapeutical activity of C968, but more studies are warranted to further confirm this mechanism.