Lip brakes have the function of limiting the movement of the lips, stabilizing the midline and inhibiting accentuated gingival exposure. The superior labial frenulum is a fold composed of mucous membrane and fibrous tissue. It is attached on one side to the inside of the upper lips and on the other side to the gums in the middle of the jaw. The objective of this study was to report a case of upper lip frenectomy in a pediatric dentistry patient. This is a study with a qualitative approach with a descriptive/observational objective. A survey was carried out in the municipality of Mato Verde-MG at Faculdade Verde Norte (FAVENORTE). A ten-year-old male patient was taken by the guardian to the dental clinic at Faculdade Verde Norte - FAVENORTE, with the following main complaint: “Large space in the front teeth”. After anamnesis, it was found that the patient had no systemic changes. On clinical examination, the presence of diastema between the permanent upper central incisors and a wide and voluminous upper labial frenulum was observed during the upper laboratory treatment. The treatment was surgical removal: Frenectomy using the Modified Archer Technique. In the case reported, it was demonstrated that the surgical technique was performed successfully, where the repositioning of the labial frenulum and new reinsertion were observed, promoting an improvement in the patient's quality of life.