Vitamin D metabolism disorders are common in chronic hemodialysis patients.The aim f our workis to determine the status of vit D in chronic hemodialysis patients followed at the ElGhassani dialysis center in order to bring out the correlations between this rate and the markers of phosphocalcic assessment. Our study is cross-sectional on 131 Moroccan patients , under periodic hemodialysis. We evaluated the status of vit D , as well as the correlation between the serum 25OHD level and the epidemiological and biological parameters of phosphocalcic metabolism. Our patients had an average of 25 (OH) D at 22.70 +/- 10.48 ng / ml 90.16% of them had a Vitamin D deficiency or deficiency. There was a correlation between the serum 25 (OH) D level and the female sex. The results of this study have shown that Vit D deficiency and deficiency are almost universal in the hemodialysis population, particularly in women in winter.