Objective Comparison of the efficacy of bleomycin over sodium tetradecyl sulfate (STS) when given intralesionally in the treatment of oral and maxillofacial venous malformation. Methods 16 patients with venous malformation in craniofacial region were randomly divided into two groups of eight. Group 1 was given intralesional injection of bleomycin and group 2 was injected with STS. All the cases were evaluated for a minimum period of two and a maximum of 3 years. Results Efficacy of bleomycin was found to be superior to STS, when used as intralesional sclerotherapic agent. Most of the vascular lesions of group 1 resolved after first dose giving a cure rate of 87.5% and no recurrence was observed. Group 2 patients however, required 4-6, a mean of five repeated dosage of intralesional STS before their lesions started to resolve and three patients reported with recurrence within 2 years, giving an overall effective response rate of 62.5%. Conclusion Bleomycin under selected conditions appears to be an excellent therapy for treating soft tissue vascular lesions of low flow nature in craniofacial region. Predictable results were obtained with a high success rate. No systemic or pulmonary complications occurred.