A suture anchor for deployment in a preformed bone hole to secure soft tissue to bone in a knotless manner. The suture anchor comprises a hollow outer member and an inner member longitudinally movable within the outer member. Suture is directed distally between the wall of the bone hole and the outer anchor member from the soft tissue to be attached to the bone transversely across an eyelet situated at the distal end of the inner member and proximally between the wall of the bone hole and the outer anchor member. A rib/groove suture-locking mechanism is provided by moving the inner member proximally relative to the outer member in order to engage the suture-locking mechanism.
