The level of oral hygiene can be measured by the presence of plaque in the oral cavity. One of the easiest ways to maintain oral hygiene status is by toothbrushing. But there are many Indonesian people who are still not aware of the importance of toothbrushing before bedtime, so the risk of oral disease can increase. Especially infants are more susceptible to oral disease. To describe the oral hygiene status of students in SDN Pucang 3 Sidoarjo, based on their toothbrushing habit. This research was a descriptive observational study with a cross-sectional approach. The research instrument to collect data of oral hygiene status was the PHP Index. Collection of data of other variables was achieved by interviewing the subjects, video observatio...