This study examines whether job satisfaction-job performance relationship models vary when creativity considered as a task characteristic. Although previous studies have pointed out the possibility of a difference in the correlation strength between these two variables based on job complexity, the evidence is incomplete. Using data from a survey of Japanese scientists, we evaluated scientists' performance by categorizing their tasks into two types, creative tasks and formulaic tasks according to creativity demands, and used publication productivity as an objective indicator. We then investigated their relationships with job satisfaction. While the tasks differed in the level of creativity required, they both were high-complexity tasks. The results showed that a job satisfaction-job performance relationship was observed only for job performance related to creative tasks. Furthermore, we examined the need for considering the relationship at both individual and group levels. Our results were consistent for both levels.