A hair retainer includes an annular body having a receiving through-hole through which a section of hair of a user is adapted to be extended. The annular body is flexible, bendable, and twistable so as to so create a variety of hair styles. Two clamping frames extend outwardly from first and second end portions of the annular body respectively. A plurality of teeth projects from an inner end of each clamping frame and extends toward an outer end of each clamping frame. A hair clipping space is defined between the plurality of teeth and one of the two clamping frames for further retaining the variety of hair styles in place.