The influence of calcium intake on bone mineralisation was evaluated in 200 girls at the age of 11-15 years and 97 women at the age of 20-23 years from a random sample of general population. The nutritional value of diets was estimated with the use of a three-day record method. Bone mineral density (BMD) of two points of radius was measured by a p-DEXA device. Mean daily intake of calcium accounted for 831±363 mg in girls and for 933±401 mg in women. An increase in calcium contents in the diet significantly influenced bone mineralisation only in girls. It was concluded that an insufficient calcium intake during puberty was connected with lower bone mineralization and thereafter risk of osteoporosis development.