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Introduction: A rudimentary non-communicating functional uterine horn is a rare congenital anomaly of the M?llerian duct. Women with this condition may experience severe dysmenorrhea, infertility, and cyclic pelvic pain due to obstructed menstrual flow. Aim: This case report aims to highlight the clinical presentation, diagnostic process, and successful laparoscopic management of a 23-year-old woman with a rudimentary non-communicating functional uterine horn, who presented with painful menstrual cycles and primary infertility. Materials and Methods: A 23-year-old woman presented with a six-month history of painful menstrual cycles and infertility. Clinical examination was followed by imaging, where an MRI revealed a rudimentary non-communicating functional uterine horn. To further evaluate her reproductive anatomy, hysteroscopy was performed to ensure that no communication existed between the rudimentary horn and the main uterine cavity. Laparoscopic excision of the rudimentary horn was planned and executed. The procedure was carried out under general anesthesia, and intraoperative findings confirmed the diagnosis. No associated anomalies were detected. Results: The patient underwent a successful laparoscopic excision of the non-communicating rudimentary horn. Postoperatively, her recovery was uneventful, and she was discharged within 48 hours. Her postoperative follow-up showed significant improvement in her symptoms of dysmenorrhea. Additionally, her reproductive potential improved, and she was advised on fertility options moving forward. Histopathological examination of the excised tissue confirmed the presence of endometrial lining, supporting the diagnosis of a functional rudimentary horn. Conclusion: Laparoscopic excision of a rudimentary non-communicating uterine horn is a safe and effective treatment for relieving symptoms of dysmenorrhea and improving fertility outcomes in affected patients. Early diagnosis and timely surgical intervention are key for symptom resolution and preserving reproductive health.