Annealing effect of Pb doped 2223 type superconductor Pb_0.35Bi_1.73Sr_1.89Ca_1.86Cu_3.0O_y under high oxygen pressure at 200 - 600 C are reported. Annealing under 100 atm of oxygen increased oxygen content and shortened the c-axis with a few degree drop in Tc. On the other hand, lead-free 2223 phase showed no change in cell parameters and Tc, but an increase in the oxygen content. It is possible that oxygen atoms enter in Bi₂O₂ layers and bismuth and lead are partially oxidized.