Since the beginning of the twenty-first century, online business has been getting more popular. Especially during the pandemic period, online business was a blessing for people to survive. Although nowadays, people get used to the pandemic, still online business is a vital part of daily life. For making online business more useful for both parties, i.e., sellers and buyers, it is important to undertake academic research. The current study aims to find out the impact of the elements of the Marketing Mix on online business in Sylhet City. A mixed questionnaire was served to the members of different online business groups for collecting data. In total 256 persons participated in the survey. It is found that the elements of the Marketing Mix have a significant impact on online business.