Abstract: Per embryonic total nucleic acid, RNA content and per cell RNA content increased during embryogenesis, reached maximun at 21 day after anthersis. The per embryo and per cell protein content also increased concomitantly. But the protein content continued to increase up to 24 days after anthersis. On the basis of dry weight, RNA content decreased in the early stage of embryogenesis, but then increased over the period of later developmental stage. The protein content on the basis of dry weight also changed in similar way. It was likely the protein and RNA content changes concomitantly during the developmental process of wheat embryo. As to per embryo DNA content, it increased in early developmental stage, but then remained in a similar level during the later stage. The relationship between the changes of RNA content and protein synthesis, embryonie develope is also discussed in present paper.