A heatable hair brush capable of being utilized for either curling or straightening hair as desired. The hair brush is also capable of being molded with integral bristles in a relatively simple two-part mold. The hair brush has a hairwinding portion provided with a plurality of longitudinally spaced bristles arranged in a pair of diametrically opposed sets of parallel bristle rows, the central row of each set being radially extended and the rows on either side of the central row being parallel thereto.