Four species of Cerambycidae (Coleoptera) are recorded for the first time for Guinea: Neoplocaederus viridipennis (Hope, 1843), N. iridescens (Atkinson, 1953), N. glabricollis (Hope, 1843) and Olenecamptus triplagiatus Jordan, 1894. Habitus photographs and distribution maps of the four species are included.