Baby carrier is a product that assists in carrying a baby using shoulder and waist straps and may burden the body when used for prolonged periods. However, there are few studies on evaluation of commercial baby carriers or the status of the latest baby carriers, such as its effects on the human body and musculoskeletal system. This study investigated the correlation between muscular diseases and usage time of baby carriers, areas and severity of subjective fatigue upon wearing them, satisfaction rate and areas of improvement for currently used baby carriers to understand drawbacks of commercial baby carriers. A survey method was implemented as the study method, including multiple choice questions, descriptive questions, a 5-point Likert scale, and Borg’s CR-10 scale. Descriptive statistics, t-test, ANOVA, and correlation analysis were conducted using SPSS. Study results revealed occurrence of waist and shoulder muscular diseases vary according to usage time of baby carriers and women display significantly more fatigue in the shoulder and waist than men when wearing baby carriers. People in their early 20s displayed more fatigue in the shoulders than those in their 30s. Subjective fatigue increased and satisfaction rate decreased as the baby’s weight increased. It was validated that subjective fatigue in shoulder and waist decreased considerably when the wearer’s weight increased. As for areas of improvement, decrease in pain, convenience in wearing and removing baby carriers, hygienic and washing convenience were mentioned.