TWI765770B

A height-adjustable clamping device for a sliding door glass includes a clamping unit having a front side, a rear side formed with a slide guide groove and an inner peripheral surface, a roller module having a roller seat movably arranged on the clamping unit and at least one roller arranged on the roller seat, and an adjustment module. The inner peripheral surface defines a bolt through-hole extending rearward along a front-rear direction. At least a part of the inner peripheral surface is formed with an internal thread along the front-rear direction. The roller seat has a reference plane extending along a left-right direction. The adjustment module includes a cam member pivotally arranged on the clamping unit and an adjustment bolt that penetrates through the bolt through-hole and is screwed with the internal thread. The cam member has a main body pivotally connected with the clamping unit and an elevating part extending rearward from the main body. The elevating part is in contact with the reference plane.