An apparatus for reattaching a detached tissue to a hard tissue includes a suture anchor, at least one button, at least one first suture, a fastener, and at least one second suture. The suture anchor is fixed on a hard tissue. The at least one button is configured to press a detached tissue on the hard tissue. The at least one first suture is secured to the suture anchor and penetrates the detached tissue and a first hollow portion of the button. The fastener is fixed on the hard tissue. The at least one second suture is secured to the fastener and penetrates a second hollow portion of the button, wherein the second suture and the first suture are knotted on the bisecting rod of the button, thereby generating a pressure on the button to uniformly press the detached tissue on the hard tissue.
