Abstract: [Object] To provide lock fasteners that can be easily manufactured to have great fastening ability. [Solution] A lock fastener includes a touch fastener and a base member 4 insert-molded to the touch fastener. The base member 4 is formed with a space 32 adapted to be filled with a resin material at a time of insert-molding, and the space 32 includes an opening 38-41 formed in a surface 25 of the base member 4. The opening 38-41 is surrounded by a peripheral wall part 45 of the surface 25. The peripheral wall part 45 is adapted to abut a base of the touch fastener at the time of insert molding and to serve as a bank for preventing the resin material filled into the space 32 from leaking.