Tritium release rates were measured for irradiated Li-Pb alloy samples prepared by a rapid cooling of a melt of Li and Pb mixed at the atomic ratio of 17:83, to study the effects of composition change on the tritium release from Li-Pb alloys. The experimental results indicated that the lithium contents varied from sample to sample. However the observed tritium release rates were similar to, previously obtained values for Li17Pb83 and were confirmed to have increased at the temperatures above the melting point.