BACKGROUND: Articular fractures of the base of the first metacarpal (Bennett fractures) have been studied for years to determine the best method of reduction and fixation. This study aims to show the application of the percutaneous reduction and internal fixation technique with cannulated screws and arthroscopic assistance in articular fractures of the base of the first metacarpal. METHODS: Descriptive cohort study in a series of 30 patients, the first cohort in our country and the largest series published so far, in which 8 patients presented with type 2A fracture and 19 patients with type 2B of the Torres-Becerra classification underwent the mentioned technique under direct vision and control of the articular reduction by arthroscopy evaluating the intraoperative characteristics of the articular surface, stability of de reduction and fixation. Assessment of functional and rehabilitation results with a minimum postoperative follow-up of 6 to 12 months. RESULTS: The senior author has used this technique with consistent clinical outcomes to improve reduction and fixation of intra-articular base fractures of first metacarpal bone (Bennett), reducing the articular step-off and gapping permitting an early rehabilitation progress with satisfactory functional results. CONCLUSIONS: We can suggest that this surgical method for the treatment of Bennett fractures may offer multiple advantages: adequate debridement of the trapeziometacarpal joint, direct visualization of the articular surface during reduction, achieving greater precision in fixation with minimum morbidity, imperceptible incisions and scars, shorter surgical time, and fewer associated complications.