Introduction:The use of motor vehicles is common during pregnancy. Correct seatbelt use during pregnancy has been shown to protect both the pregnant woman and her fetus. This survey aimed to evaluate the practices, beliefs, and knowledge of Hong Kong pregnant women of correct seatbelt use, and identify factors leading to reduced compliance and inadequate knowledge.Methods: A self-administered survey was completed by postpartum women in the postnatal ward at the United Christian Hospital, Hong Kong, from January to April 2015. Eligible surveys were available from 495 women. The primary outcome was the proportion of pregnant women who maintained or reduced seatbelt use during pregnancy. Secondary outcomes were analysed and included knowledge of correct seatbelt use, as well as contributing factors to non-compliance and inadequate knowledge. Results:There was decreased compliance with seatbelt use during pregnancy and the decrease was in line with increasing gestation. Pregnant women's knowledge about seatbelt use was inadequate and Seatbelt use by pregnant women: a survey of knowledge and practice in Hong Kong