These experiments were carried out to determine the optimum level of dietary energy and protein for lactating does and offsprings of rabbits. Experiment of was conducted using 3 levels of TDN (70, 65, 60%) and 3 levels of DCP (15, 13, 10%). A total of 27 leads of New Zealand White rabbits fed with all mash rations were divided into 9 treatments for 8 weeks. Experiment 2 was carried out with 2 levels of TDN (70,65%) and 3 level of DCP (15,13,10%). A total of 60 heads of New Zealand White rabbits fed with pelleted diets, were divided into 6 treatments for 8 weeks. The results obtained were as follows: 1. When flue initial dam weight was 3.8-4.0 kg and fed by mashed rations consorted of TDN 70% and DCP 15% (conc.:rough. 90:10), weaning weight at 8 weeks was 1.27kg and daily gain was 28.2kg while the dam body weight loss was diminished. The livability of litters was 95%, when the number of one litter was adjusted to 7 heads in Experiment 1. 2. When the initial dam weight was 4.4kg and fed by pelleted rations consisted of TDN 70% and DCP 15% (conc.:rough 83:17), weaning weight at 8 weeks was 1.52kg and daily gain was found to be 30.7g, without dam body weight loss during the period of Experiment 2. 3. The utilizability of nutrients was improved as the level of TDN was increased. And the digestibility of crude fiber was increased, as the level of TDN was lowered. However, it was not linearly affected by DCP levels. In summary, the optimum dietary requirements of energy and protein for lactating does and litters of rabbits was TDN 70% and DCP 15% (CP 19%) respectively. And it was advisable to increase the dam body weight for reproduction and to feed pelleted rations and litter size to be adjusted to 7 heads/litter.