The purpose of this study is to examine the effects of the interaction between body and environment on the creative thinking process, mainly with regard to insight problem solving. Recent studies on embodied and situated cognition suggest that complex behavior may be explained by simple sensory-motor coordination.This paper hypothesizes that creative thought depends on the interaction between the thinker's body and the physical environment in the problem situation. To examine this hypothesis, three psychological experiments were conducted. The results of experiments indicate that the size of the hands of the participants that solved the problem differed with the given object size. This suggests that the performance of insight problem solving is influenced by the physical environment and the thinkers' body.