In this study, we conducted a questionnaire survey among community pharmacists in Japan, to explore how they and the pharmacy’s management support a fellow pharmacist who has committed a medical error. Using stratified random sampling, we selected 900 pharmacies from national community pharmacies. The response rate for pharmacies was 31.7%, and we analyzed data from 572 pharmacists. It was observed that after a pharmacist committed a medical error, the subsequent treatment was relevant to the years of experience. Supervising pharmacists with little experience tended to answer that they “do not know how to get along with the colleague”. The backup to supervising pharmacists with little experience should be considerable to give care to pharmacist caused dispensing error. A few pharmacies have a support system for pharmacists concerned in an error; 38.9% of supervising pharmacists emphasized the significance of mental support. Therefore, it was suggested that concluded that head offices of pharmacies and the community pharmaceutical association should review their mental support system for pharmacists to work after committing an error.