Background: In Saudi Arabia, dental trauma is regarded as one of the most important issues affecting schoolchildren. This study evaluated Saudi Arabian schoolteachers’ knowledge, attitude, and practice regarding emergency dental trauma management. Methods: A cross-sectional study was conducted on 263 schoolteachers from 25 schools; 50.9% were females. A questionnaire was used to collect respondents’ personal and professional data and information on managing dental injury scenarios and the respondents’ attitudes toward dental injuries. A multivariate logistic regression analysis was carried out for the independent and outcome variable of inadequate knowledge regarding dental trauma management. Results: Male teachers had better knowledge than female teachers regarding emergency management of avulsed teeth. Compared to female teachers, male teachers would scrub a tooth with a toothbrush to replant it back into its socket if it fell onto the ground and was covered with dirt. Males had a significantly higher percentage of believing it is not teachers’ responsibility to care for tooth injuries in schools. Teachers with teaching experience of 5–10 years had a significantly higher percentage of training in dental emergencies. Teachers with bachelor’s degrees agreed on the need for teacher involvement to save the tooth in a timely manner. Compared to general teachers, physical education teachers would put the tooth back in the mouth and send the child to the dentist immediately if they were hit in the face and the upper front tooth fell out of their mouth. Teachers with a diploma level of education and teachers with a general type of teaching qualification were 2.15 times (CI = 0.98–3.11, p = 0.002) and 3.19 times (CI = 1.71–4.22, p = 0.0001) more likely to have a higher level of inadequate knowledge regarding dental trauma management. Conclusions: There is a need to raise teachers’ awareness and improve their dental trauma emergency management training.