Three experiments were conducted to determine suitable feeding level in the puerperium on the feed rations for Lac Son chicken. Two feeding levels of Ri chicken and 110% Ri chicken for chicken from 9 weeks to 20 weeks were tested. Each experiment had been repeated three times with 50 chickens/repetition. The result showed that the highest laying rate in both experiment groups is at 29 to 30 weeks of age from 53.33% to 54.74%. The average laying rate in the feeding levels of Ri chicken and 110% Ri chicken is 31.97% and 32.06%, respectively. The egg performance of the feeding levels of Ri chicken and 110% Ri chicken obtained 116.44 and 116.87 eggs, respectively. Feed comsumption/10 eggs is 3.70 kg and 3.72 kg. The optimum level of feeding for Lac Son chicken in the puerperium may be recommended at the same feeding levels of Ri chicken.