Abstract: A glass door includes a pane of glass securely held by upper and lower frames. A clamping device is mounted in an outer groove of each frame and includes an outer clamping member mounted in the outer groove and an inner clamping member mounted in the outer clamping member. Each of two limbs of the inner clamping member includes an inclined outer face abutting against an inwardly facing inclined face of an associated limb of the outer clamping member. A lining member is sandwiched between an associated end of the pane of glass and inner faces of the limbs of the inner clamping member. A bolt extends through the outer clamping member and the inner clamping member. When the bolt is turned, the limbs of the inner clamping member are moved toward each other to tightly clamp the associated end of the pane of glass or away from each other.