This study was conducted with the objective of determining the effects of growth regulators on internode growth in soybean under greenhouse conditions. Plants 21 days after sowing were sprayed with (2-chloroethyl) trimethylammonium chloride (CCC) 2,000 ppm, succinic acid-2,2-dimethylhydrazide (SADH) 4,000 ppm, gibberellic acid (GA) 100 ppm, indolyl-acetic acid (IAA) 100 ppm, and water as check treatment. GA increased the number of internodes in the plant. The length of the second internode was not affected by treatments. SADH reduced and GA increased the length of the fourth internode.