Teh Botol Sosro, produced by PT. Sinar Sosro, is the first brand of ready-to-drink tea in Indonesia that has been developed and maintained for decades. The number of competitors make Teh Botol Sosro remains firm in fighting in the ready to drink tea market. This study aims to analyze the effect of product quality on partial purchase decisions, price on partial purchase decisions, promotion on partial purchase decision, brand awareness on partial purchase decisions, and product quality, price, promotion and brand awareness simultaneously. The population of this research is visitor of Giant Mall Permata Tangerang. While the sample is the respondents who buy Teh Botol Sosro. The average visitor who bought Teh Botol Sosro at Giant Mall Permata Tangerang was 1,200. Thus obtained respondents to be observed with the Slovin formula is 100 respondents. Quantitative analysis method using multiple linear regression analysis, followed by determination analysis (R Square), partial hypothesis testing (t test) and simultaneous (F test) with alpha 5 percent (0,05). Prior to further analysis, data quality and classical assumption test are done. Analytical tool using SPSS version 23.0 for windows. The result of this research shows that product quality has partially influence on Purchase Decision, price has partially influence on Purchase Decision, promotion has partially influence on Purchase Decision, brand awareness has partially influence on Purchase Decision, and product quality, price, promotion and brand awareness have simultaneously influence on Purchase Decision of Teh Botol Sosro product at Giant Mall Permata Tangerang. There are still other factors that affect the Purchase Decision, therefore it still needs further research.