Synthesis, characterization, and antiproliferative activity evaluation of a series of novel pyrazole bis-carboxamide derivatives (8-12) have been described. Synthesized molecules have been screened to evaluate their antiproliferative activities against HeLa (human uterus carcinoma), Vero (green monkey kidney), and C6 (Rat Brain tumor) cells as in vitro. The tests are carried out as dose-dependent assay starting from 100 μg/mL to 500 μg/mL. Generally the compounds have been shown to possess weak antiproliferative activity against all cell lines as compared with Cisplatin and 5-Fluorouracil. Only compound 8 shows moderate antiproliferative activity against Hela cancer cells.