A taxonomic review of the fungivorous tetratomid beetles in Korea, which comprises four species belonging to two genera of two subfamilies, is presented. Three species, Holostrophus (Paraholostrophus) orientalis Lewis, 1895 and two newly recorded species, Pisenus insignis (Reitter, 1889) and Holostrophus diversefasciatus Pic, 1921, are identified and described herein. A photograph of adults, diagnoses, illustrations of diagnostic characteristics, and ecological information regarding habitat, and host fungi are provided.