A schoolased experimental Study was carried out to examine the influence of a dietary intervention on changing urinary sodium, Students sith a positive family history of essential hypertension were selected and tandomly assigned to the treatment or control group. An intervention protocol, Which was based on behavioral modification theories and methods, was designed in four Weekly 120-minute educational sessions for both students and their hypertensive parents of the intervention group. Student's knowledge of hypertension at pretest and self-efficacy in sodium restriction at post test, and parent's health perception play an important role in determining their urinary Sodium. The suggestions for future research are important.