A locking structure includes a hook disposed on a first object and engagable with a locking member disposed on a second object. The locking member includes a main body rotatable about an axis thereof and a number of locking portions radially protruding from the main body. When the main body rotates about the axis, the locking portions rotate together with the main body to engage with and disengage from the hook to lock the first object to and unlock the first object from the second object.