The sugar contents of the cell walls of 4 nonflowering plants were determined by means of High Performance Liquid Chromatography after hydrolysis treatment with diluted sulphuric acid. The result differs slightly from results obtained by other workers and show high glucose contents in the 2 mosses, Sphagnum fallax and Pogonatum aloides. Glucoronic-acid and fructose have not been found, while the alga Enteromorpha intestinalis and the lichen Parmelia acetabulum show high hemicellulose contents.