Adjustable hinge for assembling a non-frame plate glass of a bathroom

An adjustable hinge for assembling a non-frame plate glass of a bathroom includes a clamp base for Clamping a non-frame plate glass, an elastic press unit received in the clamp base and a bottom base pivotally fitted in the clamp base. The bottom base is fixed with a fixing rod fitted thereon with a position-recovering rotary button, having its outer surface bored with an engage groove and screwed with at least one tightening bolt. The engage groove is timely engaged and held by the press wheel of the elastic press unit, and the tightening bolt is screwed inward to fix the position-recovering rotary button on the fixing rod. Thus, the position-recovering rotary button can be adjusted to any preset position and the non-frame plate glass can be adjusted to swing to any position fully and accurately closed with a doorjamb.