Bleaching is a finishing process to whiten the gray fabrics. During this process it is important to ensure the demanded results with minimum fiber damage by considering environmental aspects. As a result of this, the study focused on the wool bleaching which is also an important process for the quality of wool products. It was managed with and without ultrasound and it was found that via ultrasound better bleaching results can be obtained in addition to improvement in contact angles related to the hydrophilicity. It is expected that with the addition of ultrasound to bleaching process, same results obtained with conventional bleaching will be reached with lower treatment temperatures or lower treatment time which is now essential for the protection of environment.