The purpose of a company is to create and retain those customers who already owned. Therefore, price, product quality and promotion into the factors that influence the company to be able compete with other companies that produce similar products. The purpose of this final project was to determine whether the variables of price, product quality, and promotion simultaneously had a significant influence on purchasing decision. The sampling technique used in this final project was purposive sampling. The sample consists of 100 respondents. The methods of data collection were questionnaires, interviews, and literature studies. The analysis method used in this research is multiple linier regression analysis. The tool used to test hypothesis were t-test and F-test. The results of multiple linier regression analysis values obtained linier regression equation Y = 0,575 + 0,245 X1 + 0,270 X2 + 0,293 X3. The most influential independent variables on the dependent variables was a promotion variable (0,293), followed by the product quality variable (0,270), and the last followed the price variable (0,245). While F test indicated that independent variables simultaneously influenced the purchasing decision. The coefficient of determination (R Squared) was 57,7% meaning that purchase decision was influenced by the price, product quality and promotion. Whereas 42,3% was influenced by other variables which are not observed. So, the company is suggested to expanding promotion, develop product quality and attention to price.