A string or cable anchor useful for anchoring the string to a structure, and advantageously a guitar and other stringed musical instruments, typically has a cylindrical body and alternatively a frustum body with an axial bore therethrough ending in intersection with a second bore at an acute angle. The second bore is directed downward from the axial bore and opens at a body side, the body having a body slot extending partially along the body side through the body and through the acute angle from the body side to a body axis and the axial bore. The body slot larger than the cable diameter and smaller than the string enlarged end and the axial bore larger than the string enlarged end is adapted to receive the string enlarged end into the axial bore at an anchor body top and through the axial bore to the intersection with the second bore and then downward through the second bore to outside of the cylindrical body with the string in the body slot such that as the cable is pulled upward through the axial bore, the cable enlarged end larger than the body slot is pulled against the body slot and the anchor body and is thus anchored to the cable anchor.