A protective case with a function of clearing and cleaning a display screen of an electronic device includes a case body, a clear component, and a mounting component. The case body defines a receiving space in which the electronic device is held and an opening at one end of the case body. Two opposite slide grooves are provided in the case body. The clear component on the mounting component can be pushed from an end of the case body along the display screen of the electronic device, to clear and clean it.