Background: The incidence of respiratory diseases and lung cancer is higher in elderly individuals, who constitute a large proportion of patients who require flexible bronchoscopy. Aim of the study: Was to evaluate the effect of the educational program on elderly patients undergoing flexible bronchoscopy. Research design: A quasi-experimental research design was utilized to conduct this study. Setting: The study was conducted at the Chest Outpatient Clinic in Benha University Hospital. Subject: A convenient sample of 100 elderly patients undergoing flexible bronchoscopy who are divided into two groups namely the study group and the control group. Tools: Two tools were used; Tool I: It consisted of three parts: Part I: Socio-demographic data of elderly patients, Part II; Complications after bronchoscopy. Part III: Elderly patients' knowledge toward flexible bronchoscopy includes questions about preparation, instructions before, during and after procedure, precautions and complications. Tool II: Used the Hospital Anxiety Scale (HAS) assessed hospital anxiety level. Results: 60% of the control group, and 56% in the study group aged 60-74 years old. 60% in the control group had complication of recent bronchoscopy, but 36% in the study group had complications of the recent bronchoscopy, 70% of the control group had a poor level of knowledge pre- program, and 66% of them had a poor level in the post-program. While, 70% of the study group had a poor level of knowledge pre- program, 57% of them had fair level followed by 40% who had good level in the post program. 70% of the control group had abnormal level of anxiety both in the pre-program and post-program implementation. Also, 66% of the study group had abnormal level in the pre-program, but 34% of them had abnormal level in the post-program. Conclusion: Implementing the designed educational program for elderly patients undergoing flexible bronchoscopy had a positive effect on increasing patients' knowledge, decreasing anxiety level and complications of bronchoscopy procedure in elderly patients. Recommendation: Providing appropriate information related to the disease and self-care for elderly patients, each according to his condition and his special educational needs, and correcting misinformation about flexible bronchoscopy procedure.