A holding apparatus for multipurpose may include a rotation bar having an insertion groove formed at one end portion thereof, the insertion groove having a screw thread formed thereon, and a plurality of catching protrusions formed at the another end portion thereof along an outer circumference, a clamp having a screw groove, engaged with the screw thread, which is formed at an end portion side of the clamp which is separated or engaged with the screw thread of the rotation bar and preventing the separation by an end portion inserted into the insertion groove along a rotation axis of the rotation bar, and a grip member provided to another end portion of the rotation bar, including a fastening apparatus to be fastened to a target object, and preventing rotation of the rotation bar by being caught and coupled to the catching protrusions upon locking the fastening apparatus.