Objective To investigate baccalaureate nursing interns′ intention to report medication errors, and to analyze its influencing factors, so as to provide a reference for developing targeted intervention. Methods A total of 1 173 baccalaureate nursing interns from 9 medical universities were investigated by using a general information questionnaire and the Chinese version of the Theory of Planned Behavior Medication Safety Questionnaire (TPB-MSQ). Results The scores of the interns′ intention to report medication errors, attitude, subjective norm and perceived behavior control were 5.23±0.92, 5.01±0.58, 4.98±0.63 and 4.78±0.73 respectively. The interns′ previous knowledge and experience in medication safety,attitude, subjective norm and perceived behavior control were related to their intention to report medication errors （all P＜0.05）. Regression analysis showed that, attitude was a major influencing factor of behavioral intention (adjusted R2=0.335, P＜0.05). Conclusion Baccalaureate nursing interns′ intention to report medication errors is positive, and those keeping a positive attitude are prone to form positive intention. Nursing educators should help the interns develop positive attitude towards reporting medication errors, so as to promote them to form positive reporting intention.