OBJECTIVE: Generalized pustular psoriasis (GPP) is a rare autoinflammatory skin disease characterized by recurrent, widespread eruption of sterile pustules rich in neutrophils. In addition to skin manifestations, this condition may be accompanied by fever, muscle pain, joint pain, systemic inflammation, or organ failure. GPP during pregnancy poses a serious threat to both mother and fetus, with limited options for medication. This study aimed to evaluate the safety of secukinumab during pregnancy as a treatment option for psoriasis. MATERIALS AND METHODS: We report the case of a 35-year-old pregnant woman presenting with extensive, confluent erythematous scaly plaques and numerous pustules, accompanied by fever. Over the past few years, her lesions showed remission following treatment with corticosteroids, traditional Chinese medicine, and secukinumab. However, after a brief remission with spesolimab, the lesions recurred and no significant improvement was obtained with glucocorticoid therapy. Secukinumab treatment was then initiated. RESULTS: Secukinumab was administered subcutaneously at a dose of 300 mg at weeks 0, 1, 2, 3, 4, and 8. Following treatment, GPP symptoms were reduced, and fetal development remained normal. A healthy boy was delivered vaginally at term. CONCLUSION: Our findings provide evidence that secukinumab is an effective and safe treatment option for GPP during pregnancy.