Objectives: To explore the current life sustaining treatments (LST) received by elderly dying patients of intensive care units (ICU). Materials and Methodology: Retrospective study on electronic medical record. Study subjects are targeted at 380 dying patients living in intensive care units from 1^(st) August 2013 to 31^(st) July 2015. Result: There are 227 elderly dying patients (59.7%) aged over 65, 163 of which (71.8%) match the definition of a terminal stage (＜= 6 month survival), and the rate of completing an advance directive of hospice palliative care referral form is 1.3%. The average number of elderly patients staying in ICUs and receiving LSTs before dying is 100 (SD = 185). Furthermore, aging and matching definition of a terminal stage do not make difference in the type of LSTs they received before dying. The only difference is that the early introduction of DNR discussion results in lower number of elderly patients who received LSTs before dying than those who have not discussed DNR (22.2±29 vs. 155±225 p＜0.001). In particular, remarkable differences are shown in the number of CPR, surgeries, blood test, sputum suction, peripheral and central venous catheter, endoscopy, kidney dialysis, days of receiving parenteral hydration, foley, nasogastric tube and endotracheal tube, and days of using ventilators. Conclusion: We conclude aging and matching the definition of a terminal stage make no difference in the LSTs received before dying. However, early introduction of DNR discussion can notably reduce the use of LSTs provided to elderly patients in ICUs. Accordingly, it is suggested that in addition to the promotion of advance directives to elderly people, for terminal elderly patients staying in ICUs, early introduction of DNR discussion and the provision of palliative care can lessen their suffering when receiving LSTs.