This study investigated the relationship among the drive for thinness, stress, and attitude towards sweets. It was clear that the drive for thinness is related to stress, and it has been reported that sweets induce a comfortable feeling. Although a previous study had recognized the drive for thinness as explaining a positive attitude towards sweets, the drive for thinness did not seem to directly explain this positive attitude. Rather, the stress induced by the drive for thinness did seem to explain the positive attitude towards sweets. A questionnaire survey was conducted on 258 university students (74 males and 184 females). The results indicated that the drive for thinness only explained a positive attitude towards sweets with the female subjects. A second questionnaire survey was then conducted on the 184 female university students. The results demonstrated that the drive for thinness itself did not lead to a positive attitude towards sweets, but that the combination of stress and the drive for thinness did lead to this positive attitude towards sweets.