OBJECTIVES: Increased awareness and understanding of chronic obstructive pulmonary disease (COPD) is important for its management, but there are limited data regarding the basic knowledge among patients with COPD. This study aimed to evaluate the basic information and knowledge of patients who were specifically provided with a medical exemption certificate for COPD. MATERIAL AND METHODS: This cross-sectional, observational, single-center study was conducted at an outpatient clinic of our hospital and included 201 consecutive ambulatory patients who visited the outpatient clinic between January 01, 2015 and June 30, 2015. Data regarding sex, age, educational level, symptoms, smoking history, years since diagnosis, years since obtaining the exemption certificate, and COPD GOLD (Global Initiative for Chronic Obstructive Lung Disease-GOLD) stage were obtained. A questionnaire comprising 15 questions was used. RESULTS: The question regarding the organ primarily affected by COPD was correctly answered as “lung” by 145 (72%) of patients. In addition, 152 (76%) patients declared that they knew the localization of the affected organ; only 44 (22%) patients correctly located the organ on an image. Only seven (3.5% of the total) patients could correctly write “chronic obstructive pulmonary disease.” CONCLUSION: The lack of awareness among patients with COPD emphasizes the lack in the field of patient education. Simple questionnaires can be used to determine and also to improve the awareness and basic knowledge among patients with chronic diseases.