Background: Bedsores are injuries to skin and underlying tissues caused by prolonged pressure. Detecting pressure ulcers is an important nurse diagnostic service for patients in the intensive care unit. Aim: Explore the effect of olive oil topical application on pressure ulcer development prevention among patients at intensive care unit. Methodology: design: An experimental research design was utilized. Setting: Intensive care units at Menoufia University Hospital Subject: Purposive sample of patients at control and study group 50 patients for each. Tools: four instruments were used, 1st tool: Predesigned questionnaire which contained two parts, 2nd tool: BRADEN SCALE and 3rd tool: European Pressure Ulcer Advisory Panel (EPUAP) and 4 th tool: The Pressure Ulcer Scale for Healing (PUSH) Results: presented that 56% and 18% of control group had moderate risk and high risk for pressure ulcer, while 54% and 20% of study group had moderate and high risk. Also, 48% and 34% of control group suffered from grade II and III, while 46% and 38% of study group suffered from grade II and grade I, with slight significant difference at p value <0.05*. Conclusions: olive oil had positive effect on the recovery process of pressure ulcer. Also, had positive effect on reduction of ulcer area. Furthermore, mean score of PUSH tool decreased at study group than control group. Recommendation: the application of olive oil is recommended for healing grade one pressure ulcers.