The soaps available in the market mostly contain chemicals that can potentially cause irritation making it easily exposed to bacteria. The use of natural antibacterial ingredients that can be utilized in soap formulation is whey. Whey contains lactoferrin as a natural inhibitor of microbial growth. The additional ingredients used in the production of soap is butterfly pea flower, which containing antioxidants and anthocyanins, anthocyanins can be used as natural dyes. This research aims to determine the effect of different concentrations of whey on the evaluation of the physical quality of yoghurt whey solid soap with natural dye of Butterfly pea flower (Clitoria ternatea L.). yogurt, whey: milk is 100, 75, 50, 25. Data analysis compared with the evaluation of physical quality 3532 SNI 2016. The results of the research on the characteristics of yoghurt whey solid soap preparations with natural dye from Butterfly pea flower (Clitoria ternatea L.) show cream in color, solid oval shape and distinctive aroma. pH evaluation 9-11; foam stability 12-15%; moisture content 7- 9%; total fat 9-19%; ethanol insoluble ingredients 0.004-0.017%; free alkali 0.02- 0.05%; free fatty acids 0.57-0.66%; chloride content 0.035-0.045%. The best formulation was formula 1 100% whey pH 9; moisture content 9.31%; ethanol insoluble material 0.004%; free alkali 0.03%; free fatty acid 0.46%; chloride content 0.035%. Evaluation test of fiscal quality properties of total fat 9-19% is not in accordance with the Indonesian National Standard (SNI).