Abstract: A self-adjusting climbing chock is disclosed which includes a main cable structure having a looped end and first and second cable end sections. A fixed wedge element is joined to the cable end sections, and one of the fixed wedge element faces is provided with a tapered depression. A translating wedge element, having a bearing surface which is complementary to the sliding surface of the depression, may be manually retracted against a compression spring between a first position at which the combined thickness of the fixed and translating wedge elements exceeds the maximum thickness of the fixed wedge element and a second position in which the combined thickness does not exceed the maximum thickness of the fixed wedge element.