Abstract: A string instrument headstock and headstock-neck region brace apparatus. Such an apparatus may be used to strengthen, protect, and brace the region on a string instrument, guitar, violin, mandolin, banjo, etc. where the headstock meets the neck. The apparatus cradles the underside of the string instrument with a relatively strong material. Simultaneously, the apparatus applies a force to the instrument headstock countering the stress and strain produced by the tension in the instrument strings; and the apparatus secures, braces and holds the headstock in the relatively strong brace.