With the advent of the information society in recent years, ideas are becoming more and more valuable, and divergent thinking is becoming more and more important. Although there are methods to present visual stimuli to improve divergent thinking, these methods mainly present visual stimuli to the central visual field. The purpose of this study is to test hypotheses about changes in the number and variety of divergent thinking ideas under conditions in which visual stimuli, called geometric figure animations, are presented in the peripheral visual field. The evaluation experiment was conducted with the participation of 32 university students. We asked them to perform the Alternative Uses Test (AUT) under two conditions: presenting and non-presenting geometric figure animations in the peripheral visual field. The performance of divergent thinking was evaluated by measuring the number of responses, fluency, and flexibility of the AUT. The scores were standardized because the AUT differed in difficulty depending on each AUT topic. The results showed that all scores were higher in the presenting condition than in the non-presenting condition, and the effect size of the mean difference in flexibility was moderate. On the other hand, according to the results of the questionnaire, most of the participants did not feel that the geometric figure animations provided any cues for divergent thinking. This suggests that the flexibility of divergent thinking might be improved unconsciously by geometric figure animations presented in the peripheral visual field.