A study was conducted at CSKHPKV, Palampur on pathenocarpic cucumber variety Kingstar under protected environments on oxytocin appication. Oxytocin was applied in cucumber through six methods @ 1ml/plant viz: Root treatment, Foliar spray, Injection at stem, injection at fruit, injection at peduncle and injection at blossom end. The results were compared with the Control (no application of oxytocin) treatment and it was observed that it is not easy to inject oxytocin at stem, peduncle and blossom end. The results obtaiend did not show any increase in the fruit size of the parthenocarpic cucumber.