Introduction. Arterial hypertension (HT) affects 10.4 million adult Poles, and the blood pressure (BP) control rate is only 26%. Beyond any doubt, high blood pressure results in cardiovascular (CV) target organ damage, which markedly influences national healthcare programs. Childhood introduced cardiovascular prophylaxis offers oppor tunities to decrease incident HT and delay or even eliminate its consequences. Therefore we have decided to study the level of knowledge on HT and CV disease (CVD) among random 1st and 2nd grade high school students in Tricity, Poland. Material and methods. Questionnairebased study was conducted voluntarily in two selected high schools of the Tricity agglomeration, Poland, in 2000 and repeated in 2016. All participants were presented with a 38item ques tionnaire on cardiovascular risk factors knowledge as well as students' health habits. Results. Studied group consisted of 615 students (57.6% females) at the age of 16, mean BMI 20.89 ± 2.95 kg/m