A connecting mechanism includes a body and a detachable part connected with the body. The body includes a casing and a sliding component. The casing has an insertion hole for insertion of the detachable part. The sliding component is in sliding connection with the casing, and the sliding component has access holes and clamping holes in communication therewith. The detachable part includes insertion pieces. When the sliding component slides from a first position to a second position, the access holes are opposite to the insertion hole, and the insertion pieces extend into the access holes through the insertion hole. When the sliding component slides from the second position to the first position, the insertion pieces enter the clamping holes from the access holes, thereby locking the detachable part. The assembly and disassembly of the detachable part and the body are realized through the operation of the sliding component without tools.