Abstract . This research was motivated by the author when the pre-study through observation and interviews with the general manager of Fahira Hotel Bukittinggi the author found problems such as less stable room occupancy rates, lack of effective promotions, lack of trust from guests in hotel facilities. This study aims to determine the effect of the promotion mix on the decision to purchase a room at Fahira Hotel Bukittinggi. This type of research is quantitative with a causal associative approach. The variables used in this study are the promotion mix as the independent variable and purchasing decisions as the dependent variable. The population in this study are guests who decide to purchase at Fahira Hotel Bukittinggi with a total sample of 87 respondents taken by purposive sampling technique. Collecting research data using a questionnaire and google form using a Likert scale that has been tested for validity and reliability. The results of the hypothesis analysis requirements test show that the data are classified as normal, homogeneous, and linear. Then the results of the study were obtained, then the data was processed so that it could be stated that the promotion mix was in the bad category of 35.6%, purchasing decisions were in the good enough category of 34.4%. Based on the results of a simple linear regression test, the value of r square is 0.186 and the value of sig. 0.000 0.05. Furthermore, the value of R square is 0.186, meaning that the influence between the two variables is 18.6% and 81.4% is influenced by other factors. In addition, the regression coefficient value of 0.431 means that every increase in one unit of the promotion mix will increase by 0.431 purchasing decisions at Fahira Hotel Bukittinggi.