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Background: Lichen planus (LP) is a mucocutaneous disease that is relatively common between adult populations. LP can present as skin and oral lesions. Objective: The present study aimed to detect the expression of SOCS3 in lichen planus of diseased patients as compared to normal control persons. Patients and methods: This study was a case control study included 30 Lichen planus patients as cases chosen from outpatients attending Dermatology Department at Beni- Suef University Hospital and 30 normal as controls calculated by sample size calculator formula. Results: In our study, LP cases and control were compared using SOCS3; to determine the cut-off value, we performed a ROC analysis. SOCS3 has perfect value for discrimination between LP cases and controls with an area under the ROC curve of 1.0 (95% CI = 0.940 to 1.000, P-value <0.0001). Best cut-off is a value of 1.5 (sensitivity = 100%, specificity = 1.0, J-index = 1.0). Conclusion: Our results were unique in studying the role of SOCS3 in skin form of LP. SOCS3 has perfect value for discrimination between LP cases and controls.