The COVID-19 pandemic has caused the food and beverage industry to experience a rapid decline, but KFC restaurants have survived and experienced an increase in the index percentage so that they consistently rank first as Top Brand in the fast food restaurant category. This phenomenon can be seen from the marketing mix side of a fast food restaurant business in the midst of the COVID-19 situation. The purpose of this research is to determine the effect of the marketing mix such as product, price, place, promotion on purchase decisions through purchase intention as an intervening variable. This research uses a survey with a quantitative approach. Data collection techniques using a questionnaire. Samples were taken using the Non Probability Sampling Technique with the Purposive Sampling method which were distributed to 210 consumer respondents from the KFC restaurant at Jabodetabek. The testing tool uses SmartPLS 3.0 software with the PLS-SEM analysis method.