Introduction: Today, increased patients’ knowledge about their selves rights about safety care resulted that nurses confront with legal issues. So, it is obvious that their knowledge about law and legal for self and their patients’ protection is necessary.

Aim: Assessing nurses’ knowledge, attitude and knowing how to practice about professional.

Method: This cross sectional – descriptive study was done in 2011. All of nurses who worked in teachings hospitals in Boshehr provenience were participated. Data were gathered by questionnaire that was prepared for measuring nurses’ knowledge, attitude and knowing how to practice about legal in nursing care. Internal consistency reliability (Cronbach alpha) was α=0.80. Also, data analyzed by SPSS and t-test and ANOVA statistics tests.

Results: The results showed that nurses’ knowledge levels were 2.6% poor, 90.7%moderate and 6.7% high.Also, nurses’ attitude levels were 24.7% low, 73.7% moderate and 1.5% had high.And level knowing how they must be behave only 5% of them were poor, 61.3% moderate and 38.1% of them had high level.

Conclusion: It is very important that nurses have high level of knowledge, attitude and practice about legal in nursing profession, but results showed that they had not. So, nurse managers must be implement in-service education about it for them.