We collected leaves of Pinus koraiensis and Thuja koraiensis and roots of Bletilla striata from various sites in Korea. The leaf and root samples were surface-sterilized and endophytic fungi were isolated. Fungal isolates were identified based on their morphological characteristics and a phylogenetic analysis of internal transcribed spacer regions, large subunit regions, and the β-tubulin gene. Consequently, we identified five species of endophytic fungi, namely Colletotrichum simmondsii, Fusarium sterilihyphosum, Diatrypella pulvinata, Ochroconis globalis, and Sphaeria chrysosperma. These species have not been previously reported in Korea and we report them here with descriptions and illustrations.