In the treatment of Unstable fractures of the Distal Radius, selecting a right method of treatment that can give the best result is very difficult. Many complications can be developed if improper methods are chosen o treat these fractures. We analyzed 25 patients with unstable fractures of the distal raduis, being treated with open reduction and internal fixation with T-plate from May 1986 to December in 1994 and, being followed for more than l2 months. The results were as follows; l. 1n twenty-five patients, 17 cases were Colles'fractures, 2 cases Smith fractures and 6 cases Barton' fracture.. 2. In follow-up roentgenogram, the mean values of the radial length, radial deviation, volar tilt and step-off are 18.8 mm, 20.3, 8 , 0.2mm respectively. 3. Recovery of wrist function was correlated with the degree of correction of volar tilt angle in the postoperative roentgenogram. 4. In 25 patients treated with open reduction and internal fixation using the T-plate, satisfactory result was obtained in 88'(22 cases) of patients, We concluded that this is the effective method for treating unstable fractures of the distal radius because this method permits early motion of the wrist by firm and stable fixation.