(1) Objectives: This study aims to determine the effect of physical and mental relaxation on gestational hypertension, (2) Design: This is a single blind, randomized clinical trial will be conducted in 80 pregnant women with hypertension referring to Qazvin Kosar hospitals, (3) Setting and conduction: Eligible Subjects will be selected by a convenience sampling method. Then they will be randomly assigned into two groups of 40 subjects one an intervention group (green balls) and the other a control group (blue balls), (4) Participants including major eligibility criteria: BP ≥140/90 mmHg; Singleton pregnancy; gestational age of 20-30. And the main exclusion criteria are twin pregnancy; preeclampsia; eclampsia; HELLP syndrome; Cardiovascular; kidney, brain, blood or liver disorders, (5) Interventions: Beside the usual medical care, the intervention group should participate in advanced muscle relaxation and mental imagery classes, each session 30 minute, twice a week and for 8 weeks. The blood pressures will be measured before and after the intervention. In control group, in addition to the usual medical cares, the blood pressures will be measured twice a week, before and after a 15-min rest, (6) The main outcome measures: The Systolic and diastolic blood pressure will be assessed before and after the intervention.