Traditional oil mining in Wonocolo, Kedewan District, Bojonegoro Regency, East Java Province, Indonesia, causes soil contamination, including by heavy metals. Based on bioindicators, 63.3% of soil macrofauna are dominated by ants (Hymenoptera), which have the potential to be heavy metal bioaccumulators. This study aims to analyze the types and amounts of heavy metal accumulation in the bodies and nests of ants found in Wonocolo. Samples were collected using exploration and hand shorting methods, while heavy metal accumulation was analyzed using XRF. The results showed that 13 types of ants collected accumulated heavy metals in their bodies and nests. Ten types of heavy metals were identified in the bodies of ants, with 3 of them found in all types of ants, namely Cu, Fe, and Zn. Thirteen types of heavy metals were also identified in the nests, with 6 of them found in all nests, namely Al, Fe, Mn, Sr, Ti, and Zn. Based on the number of types of metals accumulated, four types of ants have the potential to be bioaccumulators, namely: Camponotus pennsylvanicus, Tetramorium bicarinatum, Solenopsis invicta, and Cerebara colobobsis.