Background & objectives: An important part of patient satisfaction in health care centers, is the concern to protect their rights from health care providers. By observing the Patient Bill Rights,they  can effectively take care of patients. This study aimed to assess the inpatients awareness from  patients  rights and their satisfaction from observance of that rights.

Methods: This cross-sectional study was conducted in three hospitals affiliated to Tehran University of Medical Sciences. The estimated sample size was 306 patients and with regard to the assessment of patient's awareness and also, total of questionnaires were 612. The data analyzed by using T Test and ANOVA  in SPSS.18 software.

Results: Average of patient's awareness from patient rights obtained 83.4% and average of patient's satisfaction from observance of that rights were 68.9%. The highest average of awareness was related to the first axis, lowest level of awareness related to the third axis, the greatest satisfaction related to the fourth axis and the lowest level of satisfaction is also related to third axis of the patient bill rights.

Conclusion: Regarding to the lowest average in the awareness and satisfaction of the patient's was related to the third axis of  patient bill rights, it seems that hospital managers for increasing patient satisfaction, must pay further attention both to training of this axis to patient, and Also to The observance of this axis from health care providers.