Along with the development of the global economy, our society has become older and more affluent. Seniors have generally made their financial and time investments in home and family, have become free from their children's dependency, and possess a relatively large share of all discretionary dollars. Thus, the key issue of this research is to focus on the senior tourist's decision-making for GPT. A total of 293 senior tourists from Taiwan, 50 years of age or older, on the GPTs were surveyed and asked to indicate the amount of influence each family member and others had. Analysis of variance (ANOVA) was used to test whether there were significant differences in perceptions regarding the influence of family members and others according to age, gender, income, travel party, who provide the tour expenses, and times of visiting the destination in separate and entire decision-making stages.