A series of abietic acid analogs modified with a triazole moiety were synthesized using Huisgen 1,3-dipolar cycloaddition in order to obtain potent antitumor agents. The synthesized compounds and starting materials were tested in vitro against four human cancer cell lines, MDA-MB-231 and MCF-7 (human breast cancer cells), A549 (human lung cancer), PC3 (human prostate cancer), and FR2 (non-tumor human breast epithelial cell line) by MTT assay. Some of the synthesized analogs showed better biological profiles than that of the precursors. The most active compound (4-hydroxyphenyl derivative) showed an IC50 value of 35.4 mu M against MDA-MB-231 cancer cell line.