To provide a golf club protective cover containing a golf club protection opening and closing holder.

A golf club protection opening and closing holder includes: a body part 1 configured by a pair of opening and closing plates 11 and 11' which are extended having a cross section of a semicircle so as to store a shaft of a golf club, and are provided with hinge-fixing parts in one ends of the semicircle so that the plates are hinged with each other, and in which coil springs 2 for urging in the closing direction are installed in the hinge-fixing parts; and a lock part 3 which is fixed to the upper part of the opening and closing plate 11' of the pair of opening and closing plates 11 and 11' of the body part 1, and allowing the opening and closing plate 11 to be locked and unlocked.