Conioserica guineensis is a species of beetle of the family Scarabaeidae. It is found in Guinea.
Adults reach a length of about 9 mm. The upper and lower surfaces are dark brown, with a slight, somewhat silky sheen, and smooth without scales or setae. The dorsal surface of the pronotum has dense, even and medium-fine punctures, while the elytra have striae of punctures.