Consumer buying habit of food product is driven by brand name. The objective of this study is to examine whether brand name have an effect on the evaluation of sensory-based attributes in the process of purchasing a product. Brand name plays an important role even it causes psychological bias in sensory evaluation of mango fruit drink. In this study we conducted five different sensory test-blind test, open test, interchange sample test, duplicate test and brand recognition test to check the bias caused by notification of brand name. Same respondents were evaluated for all the tests. Sensory evaluation was done on attributes like color, smell, taste, sweetness, mouth feel, viscosity and overall acceptance using the 1-9 hedonic scale.