Mimosa pigra, also called giant mimosa, is regarded as one of the most aggressive invasive alien plants due to its ability to grow extensively in various land types. The dominance of this species has been found in a swamp area located in Kutai Kartanegara, East Kalimantan, Indonesia, although the area contained various heavy metals, such as lead (Pb), iron (Fe), manganese (Mn), and mercury (Hg). Hence, it is of interest to point out the ability of M. pigra to absorb those metals for its potential application as a phytoremediation agent. Furthermore, the application of M. pigra wood as charcoal feedstock was also evaluated, as it can be used by rural societies for energy production. The presence of the evaluated metals was assessed using atomic absorption spectroscopy. The charcoal was produced in a drum-based kiln commonly used by local communities. Our investigation showed that almost all evaluated heavy metals were distributed across the various parts the above-ground biomass of M. pigra, except for Pb. More importantly, it was found that M. pigra had he ability to hyperaccumulate Mn and Hg. The M. pigra charcoal also revealed a desirable properties, indicating its market opportunity. Finally, this study suggested that its utilization as an agent of phytoremediation and wood charcoal feedstock could be one of the baneficial actions against the invasiveness of M. pigra.