The present invention relates to a soybean, which can be easily processed
into a food containing free amino acids and has a high total free amino
acid content in the seeds thereof, and a method of producing such
soybean. By providing a soybean characterized in that it genetically
lacks all subunits of .beta.-conglycinin and glycinin, or has only
A.sub.3B.sub.4, which is the subunit of glynicin among the subunits of
.beta.-conglycinin and glycinin, a soybean having a total free amino
content in the seeds thereof, which is greater than those of general
soybean varieties, is provided.
