Polybothris sumptuosa, the Malagasy jewel beetle, is a species of beetle in the family Buprestidae.
Polybothris sumptuosa can reach a length of about . This jewel beetle shows various chromatic forms. There are a shiny metallic blue form (P. sumptuosa gemma), a dark green form (P. sumptuosa superba) and a dark green to black form (P. sumptuosa sumptuosa).
These wood boring beetles can be found in Madagascar.