The utility model relates to a hook. The hook is composed of a hook body, a hook pin, a pin seat, a key ring hole, an elastic resetting mechanism, and a control handle. One end of the hook body is fixed on the pin seat, and the other end of the hook body is connected with the column surface of the hook pin in a pinned state. The hook pin is arranged in the hook pin hole of the pin seat, and can axially move along the hook pin hole. The elastic resetting mechanism is arranged in the hook pin hole of the pin seat, one end of the elastic resetting mechanism is connected with the hook pin, and the other end of the elastic resetting mechanism is penetrated out the pin seat to be connected with the control handle. Compared with the prior art, the hook has the advantages of reasonable integral structure, beautiful appearance, durability, firm and reliable structure, convenient use, etc.; the fatigue of materials is not easily caused to cause the losing of the wearing articles of a key, etc.