Abstract: A low profile cord lock includes a female cord lock member, which has two insertion holes at two sides of an accommodation chamber thereof and two locating grooves in the insertion holes at the bottom side, a male cord lock member, which is received in the accommodation chamber and has a through hole and two protruding blocks that are respectively inserted into the insertion holes of the female cord lock member to allow vertical movement of the male cord lock member relative to the female cord lock member between a first position where the through hole is in axial alignment with the insertion holes for the insertion of a cord member and a second position where the through hole is deviated from the insertion holes and the inserted cord member is clocked, and a spring member mounted supported between the female cord lock member and the male cord lock member to hold male cord lock member in the second position.