This study was carried out to investigate rooting rate, plagiotrophic growth and root-promoting effect of IBA in Taxus cuspidata S, et Z. cuttings. The results obtained were summarized as follows : 1. As the ortet ages of cuttings were increased in 5, 10, to 20 years , the rooting rates were decreased in order of 85.7%, 81.7% and 62.4%, and the number of primary roots were also decreased in 5.3, 3.7 and 2.9. respectively. 2. Rooting rate by cutting types of lateral shoot were higher than those of main shoot type, significant at the 1% level . 3. IBA(l00ppm) treatment promoted the rooting rates and the number of primary roots. 4. As the ortet ages were increased in 5. 10 to 20 years, angles of central shoot of rooted cuttings which mesured cyclophysis were decreased in order of 75.9% 68.5% and 59.6%. respectively, significant at the 1% level 5. Average angles showed 77.0° for main shoot cutting, 65.9° for upper lateral shoot and 61.7° for lower lateral, which was significant at l% level, and lateral shoot cutting showed more topophysis than main shoot cutting. 6. Shoot length of rooted cuttings from main shoot cutting was longer than that from lateral shoot significant at the 1% level. 7. Relationship between some characteristics showed highly positive correlation.