The author observed the shape, number and attachment position of upper labial frenum, in 747 Korean adults (male 474, female 300), from 20 to 60 years of age. The results were as follows. 1. The number of soft tissue band in upper labial frenum both sexes. 1) Single band form; 93.8% 2) Double band form; 5.8% 3) Triple band form; 0.4% 2. The attachment region of upper labial frenum both sexes. 1) Type I; (attachment on the boundary of gum and alveolar mucosa) 74.2% 2) Type II; (attachment on the gingival tissue) 20.6% 3) Type III; (attachment on alveolar mucosa) 5.2% 3. The morphological classification: 1) Type A (unbroken band of soft tissue located in the median plane and connecting the mucous part of the lips with the mucous membrane covering the alveolar process); 63.2% 2) Type B (a frenum combined with a diastema between the upper central incisors and with an insertion in the area of the incisive papilla.); 5.8% 3) Type C (designates a soft tag of tissue attached to the free border of the frenum); 8.4% 4) Type D (a whitish, firm, nodule like thickening located at the free border of the frenum); 10.4% 5) Type E (represents variation showing duplication of the frenum); 5.8% 6) Type F (designates for developmental invagination of the mucous membrane of the frenum); 2.4% 7) Type G (designates a frenum characterized by median, vertical furrow); 0.8% 8) Type H (designates branch band according to the mucogingival line or into gingival tissue); 2.7% 9) Type O (not belongs to type A-H); 0.9%