The instant disclosure relates to a zipper head. The zipper head includes a main structure, a flexible member, a securing member, a replaceable pull tab, a guiding member, and a shaft. The main structure has a first fixing portion and receives the flexible member. The securing member has a second fixing portion corresponding to the first fixing portion. The securing member contacts with the flexible member. The guiding member is pivotally connected to one end of the main structure and contacts with the securing member. A receiving space is cooperatively defined by the main structure, the securing member, and the guiding member. A fixing end of the replaceable pull tab is disposed in the receiving space. The shaft penetrates the main structure and is pivotally connected to the securing member. The instant disclosure also discusses a method for replacing the replaceable pull tab of the zipper head.