Malnutrition is a public health problem approved by domain managers around the world. The main objective of this study is to develop some anthropometric parameters and to determine the rate of malnutrition in a well educated population of the city of Mohammedia (center of Morocco). The study was conducted as a result of an investigation, prospective, on a sample of 625 students chosen at random in six institutions of urban origin with 321 of female students 51.4% and 304 male students 48.6%. An examination and a clinical examination involving the measurement of the weight and the size have been practiced. The average weight of our population is 43.71 ± 0.56 kg. The Student t test shows no difference in average weight between the two sexes (p <0.53). The average size is 1.47 ± 0.009 meters no difference in size has been reported between the two sexes (p<0.87). The distribution of students according to their BMI shows that 40.3% in state of underweight, 7.5% are overweight and 0.8% is considered obese students. It is necessary to take adequate measures in order to limit this elevation of the prevalence of malnutrition, knowing that this phenomenon is closely linked to the rapid change of mode of life.