A total of 90 pig carcasses were analysed with the aim to determine the effects of gender and carcass weight on the tissue composition of belly with bones. While the carcass weight was similar between genders, gilts had a higher carcass lean meat content compared to barrows (56.90 ± 0.580 % and 55.58 ± 0.616 %, respectively). Also, the lean meat content in the belly with bones was higher in gilts than in barrows by 2.15 percent points (59.47 and 57.32 %, respectively). On the contrary, the content of intermuscular fat was significantly higher in barrows compared to gilts (16.97 ± 0.638 and 14.89 ± 0.571 %, respectively). The carcasses were grouped according to weight (up to 80 kg, 80 – 100 kg, above 100 kg). In gilts, the composition of belly with bones was similar in the weight groups up to 80 kg and 80 – 100 kg (lean contents 60.96 ± 1.589 % and 61.38 ± 0.878 %, respectively), while the lean content was significantly lower in the group above 100 kg of carcass weight (56.21 ± 1.280 %).