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Simple Summary: Cervical cancer represents one of the main leading causes of cancer-related mortality in women worldwide. In contrast to patients with early-stage disease, those with advanced, recurrent, or metastatic cervical cancer have a poor prognosis and new treatment strategies are needed. Immunotherapy has recently modified the natural course of different tumors, such as melanoma and lung cancer. The aim of this review is to evaluate the possible role of immune checkpoint inhibitors in cervical cancer treatment. Human papillomavirus (HPV) infection is the recognized cause of almost all cervical cancers. Despite the reduction in incidence due to a wide use of screening programs and a specific vaccine, the prognosis of cervical cancer remains poor, especially for late-stage and relapsed disease. Considering the elevated rates of PD-L1 expression in up to 80% of cervical cancers, a strong rationale supports the use of immunotherapy to restore the immune response against tumor. The aim of this review is to analyze the possible role of immune checkpoint inhibitors in cervical cancer treatment, with a particular focus on the rationale and on the results of phase I and II clinical trials. An overview of ongoing phase III studies with possible future areas of development is also provided. [ABSTRACT FROM AUTHOR]