The objective of this study was to estimate the effect of piglet birth weight on future growth intensity of fatteners in Přestice Black-Pied breed. Sixty-four piglets were divided into three groups according their birth weight. The pigs with lower birth weight achieved a lower growth intensity than pigs with higher live weight at birth. The differences in live weight among groups are statistically significant at all stages of age. The difference in slaughter weight between group of pigs with the lowest and the highest birth weight was 12.42 kg of live weight.