A new species of the palpimanid spider genus Scelidocteus Simon, 1907 is described from Salonga National Park, D. R. Congo. The new species is distinguished by the structure of the male and female copulatory organs, both sexes of Scelidocteus mbembai sp. nov. are illustrated and diagnosed against congeners. With this paper, the number of spider species recorded from Salonga, Africa's largest rainforest reserve, rises to a paltry seven, and the number of known Scelidocteus species rises to ten.