Abstract: A rib retention training assembly that is beneficial for training and practicing chest tube insertion and other invasive rib surgical procedures is envisioned to incorporate a portion of an animal rib cage covered by a synthetic sheet of human-like skin. One embodiment contemplates an apparatus comprising three framed plates each with an aperture in the center, much like a picture frame. When assembled, the synthetic sheet of human-like skin is sandwiched between a first outer framed plate and a center framed plate such that the synthetic sheet is covering the respective apertures, and the portion of the animal rib cage is sandwiched between the center frame plate and a second outer framed plate such that the rib cage is covering the respective apertures. This assembly provides a chest prop with a realistic feel for surgical simulations.