This study objectives to achieve several goals that contribute to understanding the impact of codes of conduct on the medical representative’s behavior in the Kingdom of Saudi Arabia, And so the study seeks to understand the impact of codes of conduct on behaviour Medical representative. And understand the nature of the effect Code of conduct applied by medical institutions in the Kingdom of Saudi Arabia on the level of behavior of the medical representative from where Credibility of: the medical representative - Prescribing practices - Pharmaceutical and medical promotion - Healthcare providers' and physicians' reliance on medical representatives as sources of information about medicines/products. The literature on codes of conduct and medical representative behavior will be reviewed to determine the relationship between them Medical companies in Kingdom, and the descriptive analytical research method was adopted for the benefit of the current study.

The results revealed, the following:

That Code of conduct affects the behavior of the medical representative in Saudi Arabia, It showed a statistically significant effect Between rules of conduct and improvement behavior of the medical representative, on average arithmetic (2.29) and deviation normative(0.835) at a significant level (0.05).

It is also clear that the general average​​a For Dimensions sreached its value (2.21) , the value is high On a Likert scale.

In first order The sentence (The medical representative negotiates And up to contract with Healthcare providers and doctors to increase Their reliance on Medicines/ products Which he promotes)came died arithmetic mean (2.38) and standard deviation (0.754), In the last order The sentence (The honesty and accuracy of the medical representative regarding the prices, type and quality of medical products and the promises he makes) came on average a​Arithmetic (1.97) and deviation normative (0.880)