With the development of increasingly widespread information technology, many opportunities are created in the business environment. Various companies have implemented information technology to process their business activities. The Bun House Malang is no exception, which uses Instagram to conductmarketing activities online. This study aims to determine the effect of social media marketing and electronic word of mouth on purchasing decisions at The Bun House Malang. This research is a quantitative research. Using purposive sampling technique, questionnaires were distributed online to 100 consumers of The Bun House Malang. Analysis of the data used is multiple linear regression and hypothesis testing. The results of multiple linear regression analysis and hypothesis testing indicate that social media marketing and electronic word of mouth have an effect on buying decision. The results showed that social media marketing and electronic word of mouth had an effect on purchasing decisions at The Bun House Malang. Purchasing decisions can be improved through engaging content that requires consumer engagement and increasing the intensity of positive consumer experience reviews shared on social media. It is hoped that the company can improve the quality ofcontent Instagram and services provided so that consumers share positive reviews on social media so that consumers become loyal.