Medication errors threaten patient safety by requiring admission, readmission, and/or a longer hospital stay, and can even be fatal. Near-misses indicate the potential for medication errors to have occurred. Therefore, reporting near-misses is a first step in preventing medication errors. The aim of this study was to estimate the reporting rate of near-misses among pharmacists in Korean hospitals, and to identify the factors that contributed to reporting medication errors.We surveyed 245 pharmacists from 32 hospital pharmacies for medication errors, including near-misses. We asked them to describe their experiences of near-misses in dispensing, administration, and prescribing, and to indicate the percentage of near-misses that they reported. Additionally, we asked questions related to the perception of medication errors and barriers to reporting medication errors. These questions were grouped into 4 categories: protocol and methods of reporting, incentives and protections for reporters, attitude related to reporting, and fear. Descriptive statistics and logistic regression were conducted to analyze the data.Five or more near-misses per month were experienced by 14.8%, 4.3%, and 43.9% of respondents for dispensing, administration, and prescribing errors, respectively. The percentages of respondents who stated that they reported all near-misses involving dispensing errors, administration errors, and prescribing errors were 43.7%, 57.4%, and 37.1%, respectively. Unclear reporting protocols and the absence of harm done to patients were significant factors contributing to the failure to report medication errors (P < .05).Advances can still be made in the frequency of reporting near-misses. Clear and standardized policies and procedures are likely to increase the reporting rates.