A two-art surgical fastener is provided for joining and approximating the edges of a wound in body tissue such as fascia tissue. The fastener, which can be made of an absorbable resinous material, has a fastener member and a retainer member. The fastener member has four prongs which mate with four openings in the retaining member. The two end prongs are tension legs, holding the fastener together. The two inner prongs are bent toward each other by camming surfaces in the corresponding openings in the retainer, approximating the edges of the wound.