The invention takes advantage of an elasticity of brush bristles and an axial movement of the brush assembly with respect to a brush housing to configure the brush in a retracted or an expanded position. The brush with retractable bristles allows for both an easy removal of hair and/or debris on the bristles simply by the axial movement of the brush assembly and a replacement of the brush bristles when the brush bristles are damaged or dirty. The brush with retractable bristles is configured to be used with an electric tool which enables a rotation of the brush.