Background Scientific studies on creativity have been focused on the illumination and enhancement of creativity since the mid-20th century in various fields such as psychology, education, the arts, business, engineering, etc. However, relatively speaking, studies on the obstacles to creativity have stuck to a fragmented approach. Especially, there is a lack of studies on the inhibitory factors of creativity in the field of design, in which creative solutions are required as a core for the design process. Methods The purpose of this study is to draw out and interpret the barriers to design creativity in the design process. Accordingly, this study aims to explore the inhibitory factors of design creativity as a psychological pitfall in problem-solving activities through the use of an experiment and survey. This study employs qualitative research methods by using a deductive approach in order to extract the inhibitory factors based on references of creativity from the neighboring disciplines of psychology, engineering, etc. At the same time quantitative research was conducted by using a statistical analysis of experimental data. Results Lots of factors that hinder creativity come to end as a “fixation,” a “bias,” etc. which consist of inherent and dependent elements related to cognitive objects or existences. There are typical factors such as stereotypical ideas, obsessions, excessive knowledge & experience, overwhelming representatives, past habits and customs, fixed logical thinking, etc. Design is also not an exception. Based on the errors and problems that have occurred in the design process, the barriers to design creativity are divided into internal and external groups. However, personal inclinations like emotions and nature or uncontrollable factors like customs are excluded. The internal factors are “structured thinking,” “wrong problem statements” and “high expertise.” The external factors are “overwhelming influence,” “excessive information” and “representativeness.” This study found that “influences of existence (overwhelming influence)” and “adhesion of function & technology (high expertise)” are the primary barriers to design creativity. As noted in previous studies, design fixations such as existing products or cases (pictures, drawings, etc.) which could be potential solutions, are the obstacles to making a psychological transition to a new conceptual area both consciously and unconsciously. “Structured thinking” and “wrong problem statements” are also frequently experienced psychological. However, if it is taken into consideration that design activity in the context of a systematic process is broken down into a problem-solving process, “excessive information” and “representativeness” should not be excluded from being barriers to design creativity. Conclusions Discussions on the barriers to design creativity need to equally deal with creativity illumination for both individuals and groups in a variety of contexts. The results of this study show the psychological phenomenon of the inhibitory factors of design creativity and serve to construct the foundation of the platform of design creativity. In the near future, attempts should be made to find empirical cases and practical solutions for each inhibitory factor of design creativity presented in this study.