A trunk locking system provided with an emergency trunk release handle inside a trunk, a locking mechanism of the trunk locking system being unlocked by operating the emergency trunk release handle, wherein the emergency trunk release handle includes a handle body made of a luminous resin material containing a luminous material, and a locking-mechanism interconnecting member made of a non-luminous resin material. One of the handle body and the locking-mechanism interconnecting member is molded with the other of the handle body and the locking-mechanism interconnecting member to be joined thereto with at least a part of the other of the handle body and the locking-mechanism interconnecting member embedded in the one of the handle body and the locking-mechanism interconnecting member.