An extendable rope protecting sheath is an apparatus that extends over an existing climbing rope in order to provide a barrier that protects said climbing rope from fraying and weakening as a result of direct contact with damaging surfaces. The apparatus includes an extendable sheath which folds over the climbing rope and is secured onto itself by an inner fastening strip and an outer fastening strip. The apparatus includes a first breakaway recovery strap which is connected to the extendable sheath and used to attach a breakaway wristband to the extendable sheath. The attachment between the breakaway wristband and the extendable sheath allows the user to adjust the apparatus with minimal interference to the user's range of motion. The apparatus uses a first double-sided fastening strip and a second double-sided fastening strip to secure the apparatus to the climbing rope and link multiple extendable rope protecting sheaths together.