Comfort, a concept associated with the art of nursing, is important for reducing the negative impact of hospitalization in a coronary care unit (CCU). Providing nursing interventions that ensure patient comfort is important for patients to respond positively to treatment. To determine the factors affecting comfort and the comfort levels of patients hospitalized in the CCU. A descriptive study. The study was conducted between December 2015 and February 2016 in the CCU of a state hospital located in Trabzon, Turkey. The sample consisted of 119 patients who complied with the criteria of inclusion for the study. Data were collected using the "Patient Information Form" and a "General Comfort Questionnaire." The mean patient comfort score was 3.22 ± 0.33, and we found significant relationships between comfort scores and age (r = -0.19; P = .03) and communication by nurses and physicians (P < .05). Regression analysis revealed that sufficient communication by physicians, education level, age, and having a companion were related to the comfort level (P < .05). Communication by nurses and physicians and having a companion could change the comfort levels of patients hospitalized in the CCU.