This study aims to identify and explain about the influence of service quality, product quality, price and promotion on consumer buying interest in Nusantara Mart Tulungagung. This research is a descriptive study with quantitative methods, the sampling technique used is saturated sampling technique, with a total population and sample of 110 respondents or consumers. The analysis technique used is validity test, test reliability, multiple linear regression analysis, t test (partial) and F test (simultaneous) test the coefficient of determination (R2) which was processed using the SPSS (Statiscal Product and Service Solution) program. The results of the study concluded that partially there is a positive and significant influence between service quality, product quality, price and promotion on consumer buying interest at Nusantara Mart Tulungagung. Service quality partially has a positive and significant influence on consumer buying interest, this can be seen from the significant value of t of 0.033 > 0.05. Product quality partially has a positive and significant effect on consumer buying interest, this can be seen from the significant value of t of 0.003> 0.05. Price partially has a positive and significant effect on consumer buying interest, this can be seen from the significant value of t of 0.028 > 0.05. Promotion partially has a positive and significant effect on consumer buying interest, this can be seen from the significant value of t of 0.068 >0.05. Service quality, product quality, price and promotion simultaneously have a positive and significant effect on consumer buying interest in Nusantara Mart Tulungagung, this is from a significant value of F of 0.000 <0.05.