Background: Considering the growing importance of tele-dentistry and its potential to enhance the delivery of dental services, this study aimed to assess the knowledge, attitude, and practice (KAP) of private dental offices towards this technology. Methods: This analytical cross-sectional study included 50 general dentists practicing in Semnan city, selected based on entry criteria through the enumeration method. Participants completed a demographic questionnaire (including gender and years since graduation) and a 15-item researcher-made questionnaire designed to assess their KAP towards tele-dentistry. Results: Among the participants, 54% (27 participants) were female, and 46% (23 participants) were male, with an average age of 30.2 ± 6.48 years. The mean number of years since graduation was 7.74 ± 5.13 years. The mean and standard deviation of KAP scores were 5.96 ± 1.07 (knowledge), 34.32 ± 3.41 (attitude), and 1.44 ± 0.50 (practice), respectively. Men scored significantly higher in knowledge compared to women (7.26 ± 0.91 vs. 6.70 ± 1.14; P = 0.037). There was a significant inverse correlation between knowledge scores and years since graduation (r = -0.292; P = 0.032). Additionally, 52% (26 participants) reported having used tele-dentistry, while 96% (48 participants) expressed an intention to use it in the future. Conclusions: The findings suggest that knowledge regarding tele-dentistry was notably higher among men and those with fewer years since graduation. Health policies should prioritize training programs to enhance general dentists' knowledge and practice of tele-dentistry, supporting its effective implementation in dental care.