The purpose of this study was to determine the effect of Promotion and Product Quality both partially and simultaneously on Purchasing Decisions at Kedai Tempe Mendoan Babute Bojongsari Depok with a sample of 98 Respondents. The method used is a quantitative method. Data analysis used in this study is the classical assumption test, simple linear regression analysis, multiple linear regression analysis, correlation coefficient analysis, determination coefficient analysis, T test and F test. The results of this study are Promotion has a significant effect on Purchasing Decisions on the regression Y = 2.676 + 0.936 X1, the correlation value is 0.903 meaning that the two variables have a very strong relationship. Product Quality has a significant effect on Purchasing Decisions with the regression equation Y = 3.047 + 0.920 X2, the correlation value is 0.923 meaning that the two variables have a very strong relationship. Promotion and Product Quality simultaneously have a significant effect on Purchasing Decisions with the regression equation Y = 1.503 + 0.369 X1 + 0.595 X2. The coefficient of determination value is 87.2%, while the remaining 12.8% is caused by other variables not examined in this study. The results of testing the first hypothesis obtained a calculated tvalue > ttable or (20.596 > 1.660). Based on the results of testing the second hypothesis, the calculated tvalue > ttable or (23.475 > 1.660) was obtained. Based on the results of testing the third hypothesis, the Fcount value was 322.228 > Ftable 3.092. This shows that simultaneously the Promotion and Product Quality variables have a significant influence on Purchasing Decisions