Basic knowledge of the within tree chemical components variation is essential which affects the wood end-use. Therefore, this study aimed to determine the chemical constituents (cellulose, hemicellulose, lignin, total extractive, ash contents, pH, and the solubility in hot water, cold water, and 1% NaOH) at five different levels (base, 25%, 50%,75%, and 100% of total merchantable stem height) of Albizia lebbeck trees grown in Egypt. The results showed that there was a significant effect of tree height levels on all the measured chemical constituents at 0.05 probability level. There was no specific pattern for the variation in cellulose, hemicellulose, and the solubility in 1% NaOH with the tree height levels. The cellulose and hemicellulose contents were markedly decreased at 100% of total tree height. The lignin content showed a significant gradual increase from the base up to the top of the stem. In contrast, the ash content, total extractives, and the hot and cold-water extractives showed a gradual decrease from the base to the top of the stem. Correlation analysis showed a good negative relationship between lignin and both cellulose and hemicellulose contents. Based on the results of this study, the differences in chemical composition with height along the stem must be taken into account when using the wood of these locally grown trees in various wood industries such as furniture, parquet, plywood, and paneling.