In this research, we report the evaluation of soft power support suit for upper limbs using ‘18 Weave’muscles. We have developed a novel active weave named‘18 Weave’using a thin McKibben muscle and orthoses based on a body measurement. We have protyped asssist suits based on these ideas. In this paper, we evaluate the power suit by electromyograph. Measurements of EMG confirmed significant decreases in iEMGs of the anterior deltoid, posterior deltoid, biceps brachii, and triceps brachii muscles.