Exports in Indonesia progress quite rapidly. This can be seen by many exporters compete to market their products abroad. Exporters competing to provide and give the best for their customers. Therefore, it is needed activities to protect the goods from pests attacks with fumigation. Nowadays a lot of fumigator are trying to offer the best fumigation services for exporters. This study aims to identify and analyze the influence of service quality, price and promotion to the customer's decision to use the services of fumigation in PT Sucofindo Semarang. Sampling using total sampling technique. With a target of 90 customers which use the services of fumigation in PT Sucofindo Semarang. Data collecting method used questionnaires, interviews and observation. Data were measured using a linear scale. Data processing with hypothesis testing using linear regression analysis. The result shows that there are 7 independent variables affect the customer's decision to use the services of fumigation campaign in which promotion variables are independent variables that have the highest influence value. And the price variable is the independent variable that has the smallest influence on customer decision variables to use the services of fumigation in PT Sucofindo Semarang. Rated R sequare = 71.3% means that the variable relationship is quite tight.