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This research was mainly conducted to study the accumulated level of heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) in safety vegetables in supermarkets in Bangkok. A total of 51 samples of five types of vegetables samples (cabbage, Chinese cabbage, Chinese kale, pakchoi Chinese cabbage and water convolvulus) were collected from 13 supermarkets in the inner zone of Bangkok. To quantify the amounts of heavy metal, each sample was digested and analyzed by atomic absorption spectrophotometer (AAS). The results showed that the concentration range of Cd, Cr, Cu, Mn, Ni, Pb, and Zn in these vegetables were 0.012 - 0.023, 0.211 – 0.542, 0.105 – 0.874, 2.157 – 11.652, 0.172 - 0.363, 0.111 - 0.321 and 2.405 – 4.213 mg/kg wet weight, respectively. The average heavy metal in all vegetables can be presented in descending order as follows: Mn > Zn > Cu > Cr > Ni > Pb > Cd. Among these, the highest concentration of most heavy metals was observed in water convolvulus. Only Pb observed in all types of vegetables and Cr in Chinese kale exceeded the standard notified by the Ministry of Health, Thailand and the maximum level of food contaminants required by National Food Safety Standard in China.