Occupancy room rates in 2014 decreased to 5.88%. Then in 2015 occupancy room rate increased by 3.95% although it increased, but that is still not optimal. To improve marketing performance, improvement of marketing mix strategy is needed. The research purposes are to know the result of measurement variables service quality, price, and promotion according to index rate; to know service quality, price, and promotion influence to staying decision at Patra Jasa Semarang Convention Hotel simultaneously and partially; and to know variables the most influence to staying decision at Patra Jasa Semarang Convention Hotel between service quality, price, and promotion. It is found that the regression equation Y = 0,730 + 0,256 X1 + 0,217 X2 + 0,301 X3. Staying decision variables (Y), service quality, price (X2), and promotion (x3) variable promotion is variable the most influence to staying decision. Testing the hypothesis using the t test showed that the three independent variables found significantly positive influence to staying decision as dependent variable. The F test showed that the variables service quality, price and promotion are appropriate to test the dependent variable staying decision. Figures Adjusted R square of 0.619 shows that 61.9 percent of the variation can be explained by the three independent variables in the equation regression. While 38.1 percent is explained by other variables outside of the four variables observed. From this study, Patra Jasa Semarang Convention Hotel shall expected gets to increase advertising at newspaper, and need to add advertising via television, and radio.